CA1315003C - Method of and circuit arrangement for guiding a user of a communication or data terminal - Google Patents
Method of and circuit arrangement for guiding a user of a communication or data terminalInfo
- Publication number
- CA1315003C CA1315003C CA000591615A CA591615A CA1315003C CA 1315003 C CA1315003 C CA 1315003C CA 000591615 A CA000591615 A CA 000591615A CA 591615 A CA591615 A CA 591615A CA 1315003 C CA1315003 C CA 1315003C
- Authority
- CA
- Canada
- Prior art keywords
- user
- prompt
- predetermined
- prompts
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
- G06F9/453—Help systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S715/00—Data processing: presentation processing of document, operator interface processing, and screen saver display processing
- Y10S715/978—Audio interaction as part of an operator interface
Abstract
Abstract Method of and Circuit Arrangement for Guiding a User of a Communication or Data Terminal To guide the user of a terminal, it is known to output the same prompts in the correct sequence, e.g., on a screen.
According to the invention, flexible guidance is pro-vided to different users on the basis of user data which is determined during the predetermined sequence of user actions and compared with stored reference data.
The time from the output of a prompt to the execution of an action by the user is measured, and the number of user errors per prompt is determined. The data thus ob-tained is compared with reference data characteristic of an average user. A user rated as unpracticed (i.e., below average) is then given more detailed prompts than an average user, and a user rated as practiced (i.e., above average) is given fewer or no prompts.
(Fig. 4) W. Flohrer 16
According to the invention, flexible guidance is pro-vided to different users on the basis of user data which is determined during the predetermined sequence of user actions and compared with stored reference data.
The time from the output of a prompt to the execution of an action by the user is measured, and the number of user errors per prompt is determined. The data thus ob-tained is compared with reference data characteristic of an average user. A user rated as unpracticed (i.e., below average) is then given more detailed prompts than an average user, and a user rated as practiced (i.e., above average) is given fewer or no prompts.
(Fig. 4) W. Flohrer 16
Description
~ 1 -Method of and Circuit Arrangement for Gui`ding a User of a Communi-cation or Data Terminal Thepresent invention relates to a method of and a cir-cuit arrangement for guiding a user of a communication or data term;nal wherein stored prompts of a predetermined sequence of user actions are outputted on a screen under control of a control unit.
It is known that in order to operate a user terminal in a videotex system, e.~., a television receiver, the necessary steps in the search for desired information areperformed in a dialog between the user and the v;deo-tex system. After establishment of a connect;on, an ;nit;al page is transmitted to the user, and the user is requested to enter a password. Then, messages, far example, are transmitted to the user,which can be called up by pressing a key. The d;alog is normally ended by press;ng a predetermined sequence of keys ("Der Bild-schirmtextdienst der Deutschen Bundespost", Unter-r;chtsblatter der Deutschen Bundespost, Ausgabe B, Fern-meldewesen, Jg. 36/1983, No. 8, pages 345 to 350).
The;ncreasing use of m;croprocessors, particuLarly in commun;cat;on terminals, and the characteristics of the planned multi-service ;ntegrated networks, such as broad-band ISDN, make it possible to implement increasingly complex service features.
W. Flohrer 16 -~k 131~003 2 72~30-8 Such communication terminals, however, must not be operable only by trained experts. The use of office, home, and new public terminals must be possible for a large public.
It is the object of the present invention to provide a circuit arrangement and a method whereby flexible guidance is provided to different users of a communica-tion or data terminal.
According to one aspect, the present invention provides a user terminal having an adaptive user interface, said terminal comprising: a memory for storing a plurality of machine readable prompts each corresponding to at least one user action, a control unit for determining which of the prompts are required to guide a particular user through a given predetermined sequence of said user actions and for generating a sequence of output signals corresponding to the required prompts, output means responsive to the output signals from the control unit for outputting the required prompts in a form intelligi.ble to said particular user, input means responsive to physical inputs from the particu.lar user for supplying a machine readable user input signal to the control unit corresponding to each said user action performed by the particular user, a time-measuring unit for measuring a time which elapses from the output of each said output signal until the input of any said machine readable input signal, a user-error counter responsive to the control unit for determining whether each said machine readable input signal corresponds to an erroneous user action and for counting the number of erroneous said user input signals that were inputted by the input means following an output signal corresponding to a given prompt, and a reference-data register for storing typical user reference data corresponding to 13~5003 2~ 72430-84 the predetermined sequence of user actions lncluding an upper predetermined limit value and a lower predetermined ].imit value for each user action, wherein the control unit determines whether the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie within, above, or below a reference-data interval defined by upper and lower predetermined limit values stored in the reference-data register for each user action, inserts at least one additional prompt into the sequence of user prompts to be output to that particular user by the output means by outputting one or more corresponding output signals, if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie above the upper limit value, and deletes at least one following prompt from the sequence of user prompts to be output to that particular user by the output means by not outputting one or more corresponding output signals if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie below the lower limit value.
According to another aspect, the present invention provides a method of providing adaptive guidance to a user of a terminal, the method comprising the following steps: outputting in a form intelligible to said user a particular user prompt form a predetermined stored sequence of standard user prompts corresponding to a predetermined sequence of correct user actions;
measuring and storing a time which elapses from the output of said ~3~03 2b 72430-8 particular user prompt until the performance of an initial user action by said ~ser; determining whether said initial user action is correct or erroneous and if erroneous, whether any subsequent user action is correct or erroneous; counting the initial and subsequent user actions by said user for each user prompt outp~t to said user; comparing the thus measured elapsed time and the thus counted erroneous user actions per user prompt with stored reference data for the predetermined sequence of correct user actions; outputting a next prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie within a reference-data interval defined by an upper predetermined limit value and a lower predetermined limit value; outputting at least one additional prompt inserted into the predetermined standard sequence of prompts if the measured elapsed time and the counted user errors lie above the upper limit; and skipping the output of at least one following prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie below the lower limit value.
The invention makes it possible to automatically adapt the user guidance for a communication or data terminal to the users' widely varying previous experience. A user with little previous experience will be given very detailed prompts, which will be reduced according to the user's degree of practice.
As a result, a practiced user, who only makes careless mistakes, will not be inhibited by unnecessary instructions, while less practiced users will be supported by the adaptive user guidance according to experience.
~4 .
131~003 2c 72430-8 An embodiment o:E the invention will now be explained with reEerence to the accompanying drawings, in which:
Figure 1 is a block diagram of the circuit arrangement according to the invention î
:A
:::
131~003 F;g. 2 is a schematic representation of a public video telephone;
F;g. 3 shows an input unit according to the inven-tion, for operating a public video telephone, and Fig. 4 is a flowchart serving to explain the method according to the invention.
A circuit arrangement according to the invention and a method according to the invention will be described with respect to a public telephone as shown schematically in Fig. 2~
A publ;c telephone booth Z contains a video telephone 8F
consisting essentially of a video camera K and a video display un;t BW. Since the video camera K and a picture tube of the video d;splay unit BW are not s;tuated on the same opt;cal axis, a parallax results. To avoid this, a semitransparent mirror HS is positioned in the beam path between the v;deo camera K and the user's pos;t;on. This mirror deviates the beams coming from the video camera K
so that their direction coincides with the direction of the beam path between the video display unit ~W and the user. Such a v;deo telephone BF ;s d;sclosed in German Offenlegungsschr;ft DE 34 31 902 A1.
The circuit arrangement for adapt;ve user guidance can be accommodated ;n the v;deo d;splay un;t BW. It ;ncludes a control unit SE (Fig. 1), which is connected to a memory S, in wh;ch prompts of a predeterm;ned sequence of act;ons W. Flohrer 16 .
.. . .
: . , . :
...
13~003 to be taken by the user of the publ;c video telephone are stored. The user prompts are outputted on a display unit AZ, in this case a screen ~S of the video telephone BF, and/or acoustically through a loudspeaker L.
The control unit SE is connected to an input unit E
(cf. Fig. 3) and a time-measur;ng unit ZE. The time-measuring unit ZE is also connected to the input unit E
to determine a period of time ~t which elapses from the output of a user prompt until operation of the input unit E. A user-error counter FR connected to the control unit SE counts the number of user errors per prompt.
Also connected to the control unit SE is a reference-data register RR, in which reference data for the time period and the number of errors corresponding to the pre-determined sequence of user actions are stored.
The control unit SE is also connected to a picture counter BR, wh;ch counts the number of outputted user prompts from zero to a final value K, and to a user counter TR, which serves to classify the user (will be explained later).
The control unit SE can be implemented with a commercially available microprocessor with associated write, read, and program memories as well as input/output controls.
As shown in Fig. 3, the input unit E for operatlng the public video telephone BF has a card reader KL, which is connected to a credit display GA. To effect a ver-tical adjustment of the user's image being taken by the video camera K (cf. Fig. 2), the input unit E has a first W. Flohrer 16 - .
~3~003 key T1 and a second key T2 below the f;rst key. Depression ofthe first key T1 causes the user's head to be moved up in the picture, and depression of the second key T2 causes the image to be shifted in the opposite direction.
The input unit E further includes a conventional push-button assembly TW for dialling. The video telephone BF has a hands-free facil;ty (not shown3, with the loud-ness of the reproduced sound being var;able via a third key T3 (up) and a fourth key T4 (down). A fifth key T5 of the ;nput unit E ;s prov;ded for releas;ng the tele-phone connect;on and returning the credit card~
The method of providing adaptive guidance to the user of a public video telephone BF will now be explained with the aid of the flowchart of Fig. 4 in conjunction with the input unit E shown in F;g. 3.
The user of the video telephone BF must take the following predetermined sequence of five actions:
1. inserting the credit card into the card reader KL;
2. adjusting the image with the aid of the first and ~econd keys T1, T2;
It is known that in order to operate a user terminal in a videotex system, e.~., a television receiver, the necessary steps in the search for desired information areperformed in a dialog between the user and the v;deo-tex system. After establishment of a connect;on, an ;nit;al page is transmitted to the user, and the user is requested to enter a password. Then, messages, far example, are transmitted to the user,which can be called up by pressing a key. The d;alog is normally ended by press;ng a predetermined sequence of keys ("Der Bild-schirmtextdienst der Deutschen Bundespost", Unter-r;chtsblatter der Deutschen Bundespost, Ausgabe B, Fern-meldewesen, Jg. 36/1983, No. 8, pages 345 to 350).
The;ncreasing use of m;croprocessors, particuLarly in commun;cat;on terminals, and the characteristics of the planned multi-service ;ntegrated networks, such as broad-band ISDN, make it possible to implement increasingly complex service features.
W. Flohrer 16 -~k 131~003 2 72~30-8 Such communication terminals, however, must not be operable only by trained experts. The use of office, home, and new public terminals must be possible for a large public.
It is the object of the present invention to provide a circuit arrangement and a method whereby flexible guidance is provided to different users of a communica-tion or data terminal.
According to one aspect, the present invention provides a user terminal having an adaptive user interface, said terminal comprising: a memory for storing a plurality of machine readable prompts each corresponding to at least one user action, a control unit for determining which of the prompts are required to guide a particular user through a given predetermined sequence of said user actions and for generating a sequence of output signals corresponding to the required prompts, output means responsive to the output signals from the control unit for outputting the required prompts in a form intelligi.ble to said particular user, input means responsive to physical inputs from the particu.lar user for supplying a machine readable user input signal to the control unit corresponding to each said user action performed by the particular user, a time-measuring unit for measuring a time which elapses from the output of each said output signal until the input of any said machine readable input signal, a user-error counter responsive to the control unit for determining whether each said machine readable input signal corresponds to an erroneous user action and for counting the number of erroneous said user input signals that were inputted by the input means following an output signal corresponding to a given prompt, and a reference-data register for storing typical user reference data corresponding to 13~5003 2~ 72430-84 the predetermined sequence of user actions lncluding an upper predetermined limit value and a lower predetermined ].imit value for each user action, wherein the control unit determines whether the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie within, above, or below a reference-data interval defined by upper and lower predetermined limit values stored in the reference-data register for each user action, inserts at least one additional prompt into the sequence of user prompts to be output to that particular user by the output means by outputting one or more corresponding output signals, if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie above the upper limit value, and deletes at least one following prompt from the sequence of user prompts to be output to that particular user by the output means by not outputting one or more corresponding output signals if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie below the lower limit value.
According to another aspect, the present invention provides a method of providing adaptive guidance to a user of a terminal, the method comprising the following steps: outputting in a form intelligible to said user a particular user prompt form a predetermined stored sequence of standard user prompts corresponding to a predetermined sequence of correct user actions;
measuring and storing a time which elapses from the output of said ~3~03 2b 72430-8 particular user prompt until the performance of an initial user action by said ~ser; determining whether said initial user action is correct or erroneous and if erroneous, whether any subsequent user action is correct or erroneous; counting the initial and subsequent user actions by said user for each user prompt outp~t to said user; comparing the thus measured elapsed time and the thus counted erroneous user actions per user prompt with stored reference data for the predetermined sequence of correct user actions; outputting a next prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie within a reference-data interval defined by an upper predetermined limit value and a lower predetermined limit value; outputting at least one additional prompt inserted into the predetermined standard sequence of prompts if the measured elapsed time and the counted user errors lie above the upper limit; and skipping the output of at least one following prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie below the lower limit value.
The invention makes it possible to automatically adapt the user guidance for a communication or data terminal to the users' widely varying previous experience. A user with little previous experience will be given very detailed prompts, which will be reduced according to the user's degree of practice.
As a result, a practiced user, who only makes careless mistakes, will not be inhibited by unnecessary instructions, while less practiced users will be supported by the adaptive user guidance according to experience.
~4 .
131~003 2c 72430-8 An embodiment o:E the invention will now be explained with reEerence to the accompanying drawings, in which:
Figure 1 is a block diagram of the circuit arrangement according to the invention î
:A
:::
131~003 F;g. 2 is a schematic representation of a public video telephone;
F;g. 3 shows an input unit according to the inven-tion, for operating a public video telephone, and Fig. 4 is a flowchart serving to explain the method according to the invention.
A circuit arrangement according to the invention and a method according to the invention will be described with respect to a public telephone as shown schematically in Fig. 2~
A publ;c telephone booth Z contains a video telephone 8F
consisting essentially of a video camera K and a video display un;t BW. Since the video camera K and a picture tube of the video d;splay unit BW are not s;tuated on the same opt;cal axis, a parallax results. To avoid this, a semitransparent mirror HS is positioned in the beam path between the v;deo camera K and the user's pos;t;on. This mirror deviates the beams coming from the video camera K
so that their direction coincides with the direction of the beam path between the video display unit ~W and the user. Such a v;deo telephone BF ;s d;sclosed in German Offenlegungsschr;ft DE 34 31 902 A1.
The circuit arrangement for adapt;ve user guidance can be accommodated ;n the v;deo d;splay un;t BW. It ;ncludes a control unit SE (Fig. 1), which is connected to a memory S, in wh;ch prompts of a predeterm;ned sequence of act;ons W. Flohrer 16 .
.. . .
: . , . :
...
13~003 to be taken by the user of the publ;c video telephone are stored. The user prompts are outputted on a display unit AZ, in this case a screen ~S of the video telephone BF, and/or acoustically through a loudspeaker L.
The control unit SE is connected to an input unit E
(cf. Fig. 3) and a time-measur;ng unit ZE. The time-measuring unit ZE is also connected to the input unit E
to determine a period of time ~t which elapses from the output of a user prompt until operation of the input unit E. A user-error counter FR connected to the control unit SE counts the number of user errors per prompt.
Also connected to the control unit SE is a reference-data register RR, in which reference data for the time period and the number of errors corresponding to the pre-determined sequence of user actions are stored.
The control unit SE is also connected to a picture counter BR, wh;ch counts the number of outputted user prompts from zero to a final value K, and to a user counter TR, which serves to classify the user (will be explained later).
The control unit SE can be implemented with a commercially available microprocessor with associated write, read, and program memories as well as input/output controls.
As shown in Fig. 3, the input unit E for operatlng the public video telephone BF has a card reader KL, which is connected to a credit display GA. To effect a ver-tical adjustment of the user's image being taken by the video camera K (cf. Fig. 2), the input unit E has a first W. Flohrer 16 - .
~3~003 key T1 and a second key T2 below the f;rst key. Depression ofthe first key T1 causes the user's head to be moved up in the picture, and depression of the second key T2 causes the image to be shifted in the opposite direction.
The input unit E further includes a conventional push-button assembly TW for dialling. The video telephone BF has a hands-free facil;ty (not shown3, with the loud-ness of the reproduced sound being var;able via a third key T3 (up) and a fourth key T4 (down). A fifth key T5 of the ;nput unit E ;s prov;ded for releas;ng the tele-phone connect;on and returning the credit card~
The method of providing adaptive guidance to the user of a public video telephone BF will now be explained with the aid of the flowchart of Fig. 4 in conjunction with the input unit E shown in F;g. 3.
The user of the video telephone BF must take the following predetermined sequence of five actions:
1. inserting the credit card into the card reader KL;
2. adjusting the image with the aid of the first and ~econd keys T1, T2;
3. entering the calL number to be dialled;
4. adjusting the loudness of the reproduced sound with the aid of the third and fourth keys T3, T4, and !
W. Flohrer 16 131~003 5. releasing the connect;on w;th the a;d of the f;fth key T5.
The reference data to be entered ;nto the reference-data reg;ster RR are, as a rule, determ;ned by user tests ;n-volving a sufficiently large number of test subjects ("learn;ng phase").
From the time values determined for each user prompt, a time-average value tn is calculated, and to predeterm;ne an ;nterval, an upper l;m;t value tn + a x sn and a lower lim;t value tn - a x sn are determ;ned from the standard dev;ation sn, where the constant a ~ 1.
Correspond;ngly, average values can be predetermined for the number of user errors per prompt. In the present case, a reference value of zero, i.e., zero errors per prompt, is assumed for simplicity.
It is assumed that the picture counter BR has the value BR=O at the beginning of a user guidance, and that a final value of K=4 is set for the five user actions. The user counter TR also has an initial value of TR=O, with a count of TR=O being characteristic of an average user, i.e., a user corresponding to the reference values. A negative count, TR<O, marks an unpracticed user, and a count TR~O a pract;ced user.
The count of the user-error counter FR is initially FR=O.
At the end of each user action, the user-error counter FR
is set to zero by the control unit SE. The user-error counter has a preset maximum count of FR=3.
W. Flohrer 16 ~ .
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, .
.
.
In a first step 1, cf. Fig. 4, the count of the picture counter BR is sensed, and if BR=0, this ind;cates the beginning of a user guidance~ After entering the tele-phone booth (monitored by an infrared motion detector, forexample), the user is given a first prompt 1a, i.e., the credit display GA of the input unit E shows the amount -0.00 DM to indicate to the user that the video tele-phone BF is ready for service.
In step 4, cf. Fig. 4, the time-measuring unit ZE is started. In the next step 5 it is determined whether the user has already entered any information through the in-put unit E. If that is not the case, it will be determined in step 5a whether the time measured so far, ~t,is greater or less than a predetermined reference value tA~ The value ?
tA can be chosen freely; ;n this embod;ment, it may lie between 2 and 10 seconds.
If ~t is less than the reference value tA~ step 5 w;ll be repeated; ;f ~t ;s greater, the user-error counter will be ;ncremented by one ;n step 22. In step 23, the count of the user-error counter FR is sensed, and if the pre-set maxiwum value FR=3 has not been reached yet~
execution jumps to step 19.
S;nce the measured time ~t ;s greater than the prede-termined reference value tA~ the user ;s classified as unpracticed, and an additional prompt is outputted beside the original prompt, picture n, step 20, where 1 c n c K.
This may be an acoustic rec?uest to insert the credit W. Flohrer 16 1?
,; , .
:
- 8 - 131~0~
card into the card reader KL or a corresponding wr;tten recluest on the screen BS of the video telephone BF. Exe-cution then jumps to step 4, i.e., the time Qt ;s measured again.
If it is then determined in step 5 that information has been entered through the input unit E, the time measure-ment will be terminated in step 6. If the user has in-serted the credit card into the card reader KL, i.e., if the input associated with the prompt has taken place, step 7, the count of the user-error counter FR will be sensed in step 8.
If it is determined in step 7 that the ;nput through the input unit E was effected not by inserting the credit card into the card reader K~ but by operating one of the keys T1 to T5, for example, the user has made a mistake and will be classified as unpracticed.
The user counter TR is then decremented by one in step 21, and the user-error counter FR is ;ncremented by one in step 22. This is followed by steps 23, 19, 20, and 4, as described above.
If it is found in step 23 that the count of the user-error counter is FR=3, i.e., that the maximum value F has been reached, the user-error counter FR will be set to zero in step 24. Then, the picture counter BR and the user counter TR will be set to zero in step 15, and the user guidance will be terminated in step 16.
W. Flohrer 16 ".,, .~ .
-~ 9 _ 131~003 This routine was chosen because~ if a large number of user errors are determined for a prompt, it must be assumed that the user only wants to "play" with the video telephone, so that termination of the user guidance will be appropriate.
If it is found in step 7 that the credit card was in-serted into the card reader KL, the count of the user-error counter FR will be sensed in step 8. If FR=0~ it will be determined in step 9 whether the time determined by the time-measuring unit ZE is at ~ tn + sn, i.e., whether it lies above the upper limit value tn + sn. If so, the user counter TR will be decremented by one in step 25. If not, it will be determined in step 10 whether the measured time is Qt ~ tn - sn, i.e., whether it ~ies below the lower lim;t value tn - sn. If so, the user counter TR will be incremented by one. In either case, i.e., after step Z5 or 26, step 11 is then perfarmed as follows.
If the measured time Qt l;es ne;ther above the upper limit value, step 9, nor below the lower lim;t value, step 10, the measured value w;ll be used ;n step 11 to calculate a new average value tn and assoc;ated l;mit values de-termined by the standard deviation, and stored ;n the reference-data reg;ster RR in place of the hitherto stored reference values.
lt ;s also possible to use the last, e.g., 30, measured time values for a prompt to calculate a new time-average value and corresponding limit values determined by the standard dev;at;on.
W. Flohrer 16 , , . ,.. ,.. ,.. ~. , : -.
' : . , .
. , .
Then, or if it was found in step 8 that the count of the user-error counter is FR > O, the picture counter 9R
will be incremented by one and the user-error counter FR set to zero in step 12. In step 13, the count of the picture counter BR is sensed. If BR = K + 1, i.e., if BR=5 in this embodiment, the picture counter BR and the user counter TR will be set to zero in step 15 and the user guidance will be terminated in step 16.
However, since only the first user action, insertion of the credit card into the card reader KL, has been completed, the count of the picture counter BR is now 8R=1 (step 13), and in step 14, execution jumps to step 1.
The count of the picture counter BR is now different from zero, so that the count of the user counter TR will be sensed in step 2. If TR=O, i~e., if a user has been classified as average, the next prompt, picture n, for the second action will be read from the memory S and dis-played on the screen BS in step 3.
After insertion of the credit card, the video telephone is first switched to the self-viewing mode, i.e., the user's picture being taken by the video camera K is dis-played on the screen BS together with the prompt that the picture can be shifted up or down by operating the first or second key T1, T2 of the input unit E.
Then, ;n step 4, the time ~t is measured by the time-measuring unit ZE. Step 4 is followed by the same se-quence as explained above for the first user action.
W. Flohrer 16 '~ '' ' ' '. ~
' 1 31~003 If it is found in step 2 that the count of the user counter TR is not equal to zero, the count will be checked in step 17 as to whether it is greater or less than zero.
If it is greater than zero, i.e., if the user is practiced, the output of the next prompt will be skipped or only a greatly simpl;fied prompt will be given, step 1~. This is followed by the start of the time measurement in step 4 and the sequence described above.
Should be user, because of the skipping of the prompt, be unable to adjust the picture, the user-error counter FR will be incremented by one,step 22,because the time ~t is too long compared with the stored reference value tA~ step 5a, and the user will be given a corresponding prompt to adjust the picture, step 19.
If, in step 17, the count of the user counter TR is found to be less than zero, i.e., if the user is un-practiced, an additional prompt will be outputted directly in step 19, as described above. This additional prompt for adjusting the picture with the aid of the first and second keys T1, T2 can be outputted acoustically through the loudspeaker L or v;sually on the screen 9S
of the video telephone BF.
After the output of an additional prompt or the skipping of a prompt, the time measurement by the time-measuring unit ZE is started a~ain in step 4. After completion of the second user action (user-error counter FR=O, step 2, and picture counter incremented by one, 9R=2, step 13), ,~
~ 'J. F!ohr-r 1~
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.
.
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131~003 step 1 follows for the third user action, i.e., the dialling of the wanted video-telephone subscriber via the push-button assembly TW. When this action has been completed, the picture counter BR has the value BR-3.
After establishment of a connect;on, the self-viewing mode changes to the called-subscriber-viewing mode.
For the fourth user action, the user's attention is called to the possibility of adjusting the volume via the third key T3 ~up) and the fourth key T4 (down) ~after com-pletion, BR=4), and for the fifth user action, a prompt is provided to theeffect that the connection can be re-leased with the aid of the fifth key T5.
After release of the connection, the credit card is returned (possibly accompanied by flashing of the credit display DA or by an attention tone), the amount used up is presented on the credit d;splay DA, and the screen BS is turned off.
Since the count of the picture counter is now BR=K+1, step 13, the picture counter BR and the user counter TR
are set to zero in step 15 and the user guidance is terminated in step 16.
Thus, adaptive gu;dance ;s ;mplemented not only for dif-ferent users, but also for the same user.
Themethod accord;ng to the invention makes it poss;ble to class;fy a user for the next user action (cf. step 2 ;n Fig. 4) as less qual;fied, average, or more highly qualified. Furthermore, it is poss;ble to correct any W. Flohrer 16 131~003 initial wrong qualifications in the course of the subsequent user actions.
This adaptive user guidance permits better utilization of the communication or data terminals but can be used in principle for any man-mach;ne interface.
The skipping of prompts enables practiced users to use the terminal more steadily.
Unpracticed users will make fewer mistakes thanks to more detailed prompts In both cases, the terminal be- -comes free for other users more quickly.
W. Flohrer 16 ,i . ~
.~, . ~,. ..... .......... . ..
~ ' :
~ '
W. Flohrer 16 131~003 5. releasing the connect;on w;th the a;d of the f;fth key T5.
The reference data to be entered ;nto the reference-data reg;ster RR are, as a rule, determ;ned by user tests ;n-volving a sufficiently large number of test subjects ("learn;ng phase").
From the time values determined for each user prompt, a time-average value tn is calculated, and to predeterm;ne an ;nterval, an upper l;m;t value tn + a x sn and a lower lim;t value tn - a x sn are determ;ned from the standard dev;ation sn, where the constant a ~ 1.
Correspond;ngly, average values can be predetermined for the number of user errors per prompt. In the present case, a reference value of zero, i.e., zero errors per prompt, is assumed for simplicity.
It is assumed that the picture counter BR has the value BR=O at the beginning of a user guidance, and that a final value of K=4 is set for the five user actions. The user counter TR also has an initial value of TR=O, with a count of TR=O being characteristic of an average user, i.e., a user corresponding to the reference values. A negative count, TR<O, marks an unpracticed user, and a count TR~O a pract;ced user.
The count of the user-error counter FR is initially FR=O.
At the end of each user action, the user-error counter FR
is set to zero by the control unit SE. The user-error counter has a preset maximum count of FR=3.
W. Flohrer 16 ~ .
.,~ .
, .
.
.
In a first step 1, cf. Fig. 4, the count of the picture counter BR is sensed, and if BR=0, this ind;cates the beginning of a user guidance~ After entering the tele-phone booth (monitored by an infrared motion detector, forexample), the user is given a first prompt 1a, i.e., the credit display GA of the input unit E shows the amount -0.00 DM to indicate to the user that the video tele-phone BF is ready for service.
In step 4, cf. Fig. 4, the time-measuring unit ZE is started. In the next step 5 it is determined whether the user has already entered any information through the in-put unit E. If that is not the case, it will be determined in step 5a whether the time measured so far, ~t,is greater or less than a predetermined reference value tA~ The value ?
tA can be chosen freely; ;n this embod;ment, it may lie between 2 and 10 seconds.
If ~t is less than the reference value tA~ step 5 w;ll be repeated; ;f ~t ;s greater, the user-error counter will be ;ncremented by one ;n step 22. In step 23, the count of the user-error counter FR is sensed, and if the pre-set maxiwum value FR=3 has not been reached yet~
execution jumps to step 19.
S;nce the measured time ~t ;s greater than the prede-termined reference value tA~ the user ;s classified as unpracticed, and an additional prompt is outputted beside the original prompt, picture n, step 20, where 1 c n c K.
This may be an acoustic rec?uest to insert the credit W. Flohrer 16 1?
,; , .
:
- 8 - 131~0~
card into the card reader KL or a corresponding wr;tten recluest on the screen BS of the video telephone BF. Exe-cution then jumps to step 4, i.e., the time Qt ;s measured again.
If it is then determined in step 5 that information has been entered through the input unit E, the time measure-ment will be terminated in step 6. If the user has in-serted the credit card into the card reader KL, i.e., if the input associated with the prompt has taken place, step 7, the count of the user-error counter FR will be sensed in step 8.
If it is determined in step 7 that the ;nput through the input unit E was effected not by inserting the credit card into the card reader K~ but by operating one of the keys T1 to T5, for example, the user has made a mistake and will be classified as unpracticed.
The user counter TR is then decremented by one in step 21, and the user-error counter FR is ;ncremented by one in step 22. This is followed by steps 23, 19, 20, and 4, as described above.
If it is found in step 23 that the count of the user-error counter is FR=3, i.e., that the maximum value F has been reached, the user-error counter FR will be set to zero in step 24. Then, the picture counter BR and the user counter TR will be set to zero in step 15, and the user guidance will be terminated in step 16.
W. Flohrer 16 ".,, .~ .
-~ 9 _ 131~003 This routine was chosen because~ if a large number of user errors are determined for a prompt, it must be assumed that the user only wants to "play" with the video telephone, so that termination of the user guidance will be appropriate.
If it is found in step 7 that the credit card was in-serted into the card reader KL, the count of the user-error counter FR will be sensed in step 8. If FR=0~ it will be determined in step 9 whether the time determined by the time-measuring unit ZE is at ~ tn + sn, i.e., whether it lies above the upper limit value tn + sn. If so, the user counter TR will be decremented by one in step 25. If not, it will be determined in step 10 whether the measured time is Qt ~ tn - sn, i.e., whether it ~ies below the lower lim;t value tn - sn. If so, the user counter TR will be incremented by one. In either case, i.e., after step Z5 or 26, step 11 is then perfarmed as follows.
If the measured time Qt l;es ne;ther above the upper limit value, step 9, nor below the lower lim;t value, step 10, the measured value w;ll be used ;n step 11 to calculate a new average value tn and assoc;ated l;mit values de-termined by the standard deviation, and stored ;n the reference-data reg;ster RR in place of the hitherto stored reference values.
lt ;s also possible to use the last, e.g., 30, measured time values for a prompt to calculate a new time-average value and corresponding limit values determined by the standard dev;at;on.
W. Flohrer 16 , , . ,.. ,.. ,.. ~. , : -.
' : . , .
. , .
Then, or if it was found in step 8 that the count of the user-error counter is FR > O, the picture counter 9R
will be incremented by one and the user-error counter FR set to zero in step 12. In step 13, the count of the picture counter BR is sensed. If BR = K + 1, i.e., if BR=5 in this embodiment, the picture counter BR and the user counter TR will be set to zero in step 15 and the user guidance will be terminated in step 16.
However, since only the first user action, insertion of the credit card into the card reader KL, has been completed, the count of the picture counter BR is now 8R=1 (step 13), and in step 14, execution jumps to step 1.
The count of the picture counter BR is now different from zero, so that the count of the user counter TR will be sensed in step 2. If TR=O, i~e., if a user has been classified as average, the next prompt, picture n, for the second action will be read from the memory S and dis-played on the screen BS in step 3.
After insertion of the credit card, the video telephone is first switched to the self-viewing mode, i.e., the user's picture being taken by the video camera K is dis-played on the screen BS together with the prompt that the picture can be shifted up or down by operating the first or second key T1, T2 of the input unit E.
Then, ;n step 4, the time ~t is measured by the time-measuring unit ZE. Step 4 is followed by the same se-quence as explained above for the first user action.
W. Flohrer 16 '~ '' ' ' '. ~
' 1 31~003 If it is found in step 2 that the count of the user counter TR is not equal to zero, the count will be checked in step 17 as to whether it is greater or less than zero.
If it is greater than zero, i.e., if the user is practiced, the output of the next prompt will be skipped or only a greatly simpl;fied prompt will be given, step 1~. This is followed by the start of the time measurement in step 4 and the sequence described above.
Should be user, because of the skipping of the prompt, be unable to adjust the picture, the user-error counter FR will be incremented by one,step 22,because the time ~t is too long compared with the stored reference value tA~ step 5a, and the user will be given a corresponding prompt to adjust the picture, step 19.
If, in step 17, the count of the user counter TR is found to be less than zero, i.e., if the user is un-practiced, an additional prompt will be outputted directly in step 19, as described above. This additional prompt for adjusting the picture with the aid of the first and second keys T1, T2 can be outputted acoustically through the loudspeaker L or v;sually on the screen 9S
of the video telephone BF.
After the output of an additional prompt or the skipping of a prompt, the time measurement by the time-measuring unit ZE is started a~ain in step 4. After completion of the second user action (user-error counter FR=O, step 2, and picture counter incremented by one, 9R=2, step 13), ,~
~ 'J. F!ohr-r 1~
. ' , .
.
.
~ ' ' .
, , ~ .
131~003 step 1 follows for the third user action, i.e., the dialling of the wanted video-telephone subscriber via the push-button assembly TW. When this action has been completed, the picture counter BR has the value BR-3.
After establishment of a connect;on, the self-viewing mode changes to the called-subscriber-viewing mode.
For the fourth user action, the user's attention is called to the possibility of adjusting the volume via the third key T3 ~up) and the fourth key T4 (down) ~after com-pletion, BR=4), and for the fifth user action, a prompt is provided to theeffect that the connection can be re-leased with the aid of the fifth key T5.
After release of the connection, the credit card is returned (possibly accompanied by flashing of the credit display DA or by an attention tone), the amount used up is presented on the credit d;splay DA, and the screen BS is turned off.
Since the count of the picture counter is now BR=K+1, step 13, the picture counter BR and the user counter TR
are set to zero in step 15 and the user guidance is terminated in step 16.
Thus, adaptive gu;dance ;s ;mplemented not only for dif-ferent users, but also for the same user.
Themethod accord;ng to the invention makes it poss;ble to class;fy a user for the next user action (cf. step 2 ;n Fig. 4) as less qual;fied, average, or more highly qualified. Furthermore, it is poss;ble to correct any W. Flohrer 16 131~003 initial wrong qualifications in the course of the subsequent user actions.
This adaptive user guidance permits better utilization of the communication or data terminals but can be used in principle for any man-mach;ne interface.
The skipping of prompts enables practiced users to use the terminal more steadily.
Unpracticed users will make fewer mistakes thanks to more detailed prompts In both cases, the terminal be- -comes free for other users more quickly.
W. Flohrer 16 ,i . ~
.~, . ~,. ..... .......... . ..
~ ' :
~ '
Claims (12)
1. A user terminal having an adaptive user interface, said terminal comprising:
a memory for storing a plurality of machine readable prompts each corresponding to at least one user action, a control unit for determining which of the prompts are required to guide a particular user through a given predetermined sequence of said user actions and for generating a sequence of output signals corresponding to the required prompts, output means responsive to the output signals from the control unit for outputting the required prompts in a form intelligible to said particular user, input means responsive to physical inputs from the particular user for supplying a machine readable user input signal to the control unit corresponding to each said user action performed by the particular user, a time-measuring unit for measuring a time which elapses from the output of each said output signal until the input of any said machine readable input signal, a user-error counter responsive to the control unit for determining whether each said machine readable input signal corresponds to an erroneous user action and for counting the number of erroneous said user input signals that were inputted by the input means following an output signal corresponding to a given prompt, and a reference-data register for storing typical user reference data corresponding to the predetermined sequence of user actions including an upper predetermined limit value and a lower predetermined limit value for each user action, wherein the control unit determines whether the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie within, above, or below a reference-data interval defined by upper and lower predetermined limit values stored in the reference-data register for each user action, inserts at least one additional prompt into the sequence of user prompts to be output to that particular user by the output means by outputting one or more corresponding output signals, if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie above the upper limit value, and deletes at least one following prompt from the sequence of user prompts to be output to that particular user by the output means by not outputting one or more corresponding output signals if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie below the lower limit value.
a memory for storing a plurality of machine readable prompts each corresponding to at least one user action, a control unit for determining which of the prompts are required to guide a particular user through a given predetermined sequence of said user actions and for generating a sequence of output signals corresponding to the required prompts, output means responsive to the output signals from the control unit for outputting the required prompts in a form intelligible to said particular user, input means responsive to physical inputs from the particular user for supplying a machine readable user input signal to the control unit corresponding to each said user action performed by the particular user, a time-measuring unit for measuring a time which elapses from the output of each said output signal until the input of any said machine readable input signal, a user-error counter responsive to the control unit for determining whether each said machine readable input signal corresponds to an erroneous user action and for counting the number of erroneous said user input signals that were inputted by the input means following an output signal corresponding to a given prompt, and a reference-data register for storing typical user reference data corresponding to the predetermined sequence of user actions including an upper predetermined limit value and a lower predetermined limit value for each user action, wherein the control unit determines whether the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie within, above, or below a reference-data interval defined by upper and lower predetermined limit values stored in the reference-data register for each user action, inserts at least one additional prompt into the sequence of user prompts to be output to that particular user by the output means by outputting one or more corresponding output signals, if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie above the upper limit value, and deletes at least one following prompt from the sequence of user prompts to be output to that particular user by the output means by not outputting one or more corresponding output signals if the control unit determines that the elapsed time and the number of erroneous user inputs as respectively determined by the time-measuring unit and the user-error counter lie below the lower limit value.
2. A terminal as claimed in claim 1, further comprising a "picture" counter for counting a number of completed actions of the predetermined sequence of user actions from zero to a final value K wherein, upon reaching the count K+1, the picture counter is reset to zero by the control unit.
3. A terminal as claimed in claim 1, further comprising a user counter which is initially set at zero for each user, which is incremented by one whenever the control unit determines that a predetermined function of the elapsed time and the number of erroneous user inputs lies below the lower limit value, and is decremented by one whenever the said predetermined function lies above the upper limit value, and whose count is left unchanged if the said predetermined function lies within the reference-data interval defined by the limit values.
4. A terminal as claimed in claim 3, further comprising a "picture" counter for counting the number of completed actions of the predetermined sequence of user actions from zero to a final value K, upon reaching the count K+1, wherein the control unit sets the user counter to zero when the count of the picture counter is equal to K+1.
5. A terminal as claimed in claim 1, wherein the user-error counter is incremented by one with each said erroneous user input in response to a given prompt, and upon attainment of a predetermined maximum value F, the control unit terminates the user prompts and sets the user-error counter to zero.
6. A terminal as claimed in claim 5, wherein at a count of the user-error counter greater than zero and less than the maximum value F, at least one additional prompt is inserted into the predetermined sequence of user actions and output to the user by the output means under control of the control unit.
7. A method of providing adaptive guidance to a user of a terminal, the method comprising the following steps:
outputting in a form intelligible to said user a particular user prompt form a predetermined stored sequence of standard user prompts corresponding to a predetermined sequence of correct user actions;
measuring and storing a time which elapses from the output of said particular user prompt until the performance of an initial user action by said user;
determining whether said initial user action is correct or erroneous and if erroneous, whether any subsequent user action is correct or erroneous;
counting the initial and subsequent user actions by said user for each user prompt output to said user;
comparing the thus measured elapsed time and the thus counted erroneous user actions per user prompt with stored reference data for the predetermined sequence of correct user actions;
outputting a next prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie within a reference-data interval defined by an upper predetermined limit value and a lower predetermined limit value;
outputting at least one additional prompt inserted into the predetermined standard sequence of prompts if the measured elapsed time and the counted user errors lie above the upper limit; and skipping the output of at least one following prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie below the lower limit value.
outputting in a form intelligible to said user a particular user prompt form a predetermined stored sequence of standard user prompts corresponding to a predetermined sequence of correct user actions;
measuring and storing a time which elapses from the output of said particular user prompt until the performance of an initial user action by said user;
determining whether said initial user action is correct or erroneous and if erroneous, whether any subsequent user action is correct or erroneous;
counting the initial and subsequent user actions by said user for each user prompt output to said user;
comparing the thus measured elapsed time and the thus counted erroneous user actions per user prompt with stored reference data for the predetermined sequence of correct user actions;
outputting a next prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie within a reference-data interval defined by an upper predetermined limit value and a lower predetermined limit value;
outputting at least one additional prompt inserted into the predetermined standard sequence of prompts if the measured elapsed time and the counted user errors lie above the upper limit; and skipping the output of at least one following prompt in the predetermined standard sequence of user prompts if the measured elapsed time and the counted user errors lie below the lower limit value.
8. A method as claimed in claim 7, wherein the stored reference data are calculated from the average and the standard deviation of previously measured elapsed time values.
9. A method as claimed in claim 8, wherein new limit values are calculated if a current value for the measured elapsed time lies within a thus previously calculated interval.
10. A method as claimed in claim 8, wherein a predetermined fixed number of previously measured time values for each user prompt are used to calculate the limit values.
11. A terminal as claimed in claim 1, wherein said output means comprises a visual display unit.
12. A terminal as claimed in claim 1, wherein said output means comprises a loudspeaker.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3806293.3 | 1988-02-27 | ||
| DE3806293A DE3806293A1 (en) | 1988-02-27 | 1988-02-27 | METHOD AND CIRCUIT ARRANGEMENT FOR USER GUIDING A TERMINAL DEVICE OF MESSAGE OR DATA TECHNOLOGY |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1315003C true CA1315003C (en) | 1993-03-23 |
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|---|---|---|---|
| CA000591615A Expired - Fee Related CA1315003C (en) | 1988-02-27 | 1989-02-21 | Method of and circuit arrangement for guiding a user of a communication or data terminal |
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|---|---|
| US (1) | US5042006A (en) |
| EP (1) | EP0330944B1 (en) |
| JP (1) | JPH028921A (en) |
| AT (1) | ATE95328T1 (en) |
| CA (1) | CA1315003C (en) |
| DE (2) | DE3806293A1 (en) |
| ES (1) | ES2046343T3 (en) |
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| US20060050865A1 (en) * | 2004-09-07 | 2006-03-09 | Sbc Knowledge Ventures, Lp | System and method for adapting the level of instructional detail provided through a user interface |
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1988
- 1988-02-27 DE DE3806293A patent/DE3806293A1/en not_active Withdrawn
-
1989
- 1989-02-18 EP EP89102855A patent/EP0330944B1/en not_active Expired - Lifetime
- 1989-02-18 AT AT89102855T patent/ATE95328T1/en not_active IP Right Cessation
- 1989-02-18 ES ES198989102855T patent/ES2046343T3/en not_active Expired - Lifetime
- 1989-02-18 DE DE89102855T patent/DE58905717D1/en not_active Expired - Fee Related
- 1989-02-21 CA CA000591615A patent/CA1315003C/en not_active Expired - Fee Related
- 1989-02-27 US US07/316,412 patent/US5042006A/en not_active Expired - Fee Related
- 1989-02-27 JP JP1046399A patent/JPH028921A/en active Granted
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| JPH0576052B2 (en) | 1993-10-21 |
| US5042006A (en) | 1991-08-20 |
| DE3806293A1 (en) | 1989-09-07 |
| ES2046343T3 (en) | 1994-02-01 |
| DE58905717D1 (en) | 1993-11-04 |
| ATE95328T1 (en) | 1993-10-15 |
| EP0330944A2 (en) | 1989-09-06 |
| EP0330944B1 (en) | 1993-09-29 |
| JPH028921A (en) | 1990-01-12 |
| EP0330944A3 (en) | 1990-10-31 |
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