1 of 54 Basic Exercises Appendix Study Question Answers E-Prime 2002 Workshop Files on My Documents\My Experiments\Workshop\E-Prime Exercises Copyright

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1 of 54Basic Exercises

Appendix Study Appendix Study Question AnswersQuestion Answers

E-Prime 2002 WorkshopE-Prime 2002 Workshop

Files on My Documents\My Experiments\Workshop\Files on My Documents\My Experiments\Workshop\E-Prime ExercisesE-Prime Exercises

Copyright Psychology Software Tools Inc. 2002Copyright Psychology Software Tools Inc. 2002

These may be used for local educational purposes only, all other use These may be used for local educational purposes only, all other use must be approved in writing, send requests to [email protected] be approved in writing, send requests to [email protected]


Basic Exercise 1 Lexical Decision Study QuestionsBasic Exercise 1 Lexical Decision Study Questions

Could you at this point?Could you at this point?1.1. Increase the number of words/non-words?Increase the number of words/non-words? On the DesignList Object, Click On the DesignList Object, Click

the add rows icon and enter the rows.the add rows icon and enter the rows.2.2. Change the keyboard to a mouse response? Change the keyboard to a mouse response? On the Probe object click the On the Probe object click the

properties page, on the Duration/Input page select the Keyboard and delete it, properties page, on the Duration/Input page select the Keyboard and delete it, then add the Mouse. Note the mouse buttons are 1,2.then add the Mouse. Note the mouse buttons are 1,2.

3.3. Change the duration of the display to 4 seconds? Change the duration of the display to 4 seconds? On the Probe object click On the Probe object click the properties page, on the Duration/Input page set duration to 4000.the properties page, on the Duration/Input page set duration to 4000.

4.4. Change the font color and size? Change the font color and size? On the Probe object click the properties On the Probe object click the properties page, on the General page, change the Foreground color to the desired color page, on the General page, change the Foreground color to the desired color (note can select a color from the drop down, specify the red/green/blue (note can select a color from the drop down, specify the red/green/blue intensity “0,255,0” is green, or use an attribute to set the color. The font size intensity “0,255,0” is green, or use an attribute to set the color. The font size must be set on the Font page. must be set on the Font page.

5.5. Alter the color of the probe with a stimulus attribute? Alter the color of the probe with a stimulus attribute? Add a color attribute to Add a color attribute to the DesignList then reference it on the General page of the Probe stimulus the DesignList then reference it on the General page of the Probe stimulus using the [StimColor] type reference.using the [StimColor] type reference.

6.6. Change the sampling method to random? Change the sampling method to random? On the design list select the On the design list select the properties page, select the Selection method order random. properties page, select the Selection method order random.


Basic Exercise 2 Feedback Study QuestionsBasic Exercise 2 Feedback Study Questions

Could you at this point? Could you at this point?

1.1. Change the text of the correct message? Change the text of the correct message? Go into the FeedbackDisplay1 Go into the FeedbackDisplay1 object, select the Correct tab, Select the text object showing “Correct” and object, select the Correct tab, Select the text object showing “Correct” and change it to “good job, keep it up”.change it to “good job, keep it up”.

2.2. Delete the average percent correct display? Delete the average percent correct display? Go into the FeedbackDisplay1 Go into the FeedbackDisplay1 object, select the Correct panel, Select the text object showing object, select the Correct panel, Select the text object showing “@ACC.MEAN Average Percent Correct” and delete it. Do the same for “@ACC.MEAN Average Percent Correct” and delete it. Do the same for the Incorrect panel. the Incorrect panel.

Short Answers are included in the Exercise AppendixShort Answers are included in the Exercise Appendix


Basic Exercise 3 Nested Lists Study QuestionsBasic Exercise 3 Nested Lists Study QuestionsCould you at this point? Could you at this point? 1.1. Predict what would be the presentation if the DesignList had a weights of 2? Predict what would be the presentation if the DesignList had a weights of 2?

There would then be 2 samples of the Words list followed by two samples of the There would then be 2 samples of the Words list followed by two samples of the NonWords list. NonWords list.

2.2. Predict the stimuli if the Design List had weights of 1 and the word lists had Predict the stimuli if the Design List had weights of 1 and the word lists had weight of 2 all sequential sampling? weight of 2 all sequential sampling? The stimuli would alternate word, nonword The stimuli would alternate word, nonword with each word being presented twice successively (i e., cat, jop, cat, jop, dog, with each word being presented twice successively (i e., cat, jop, cat, jop, dog, lih, dog, lih).lih, dog, lih).

3.3. Predict Random ordering design list sequential ordering of Words, and random Predict Random ordering design list sequential ordering of Words, and random of NonWords? of NonWords? The word/nonword would be random and items in the NonWords The word/nonword would be random and items in the NonWords would be random. A possible sequence might be cat, dog, jat, time, muw, jop, would be random. A possible sequence might be cat, dog, jat, time, muw, jop, …)…)

4.4. Sample stimuli from 3 lists? Sample stimuli from 3 lists? Add lists, such as nouns, verbs, directobject, then Add lists, such as nouns, verbs, directobject, then in the Nested list put the string “nouns,verbs,directobjects” then each list will be in the Nested list put the string “nouns,verbs,directobjects” then each list will be sampled once and the attributes for the lists would be put in the context. Note do sampled once and the attributes for the lists would be put in the context. Note do not reuse the same attribute names across the lists. not reuse the same attribute names across the lists.

5.5. Sample multiple items from the same list in a sample? Sample multiple items from the same list in a sample? This involves using the This involves using the colon syntax for the multiple samples. If there attribute on the list were “words” colon syntax for the multiple samples. If there attribute on the list were “words” then referencing ‘[word:0] [word:1] [word:2] would pick 3 words from the list. then referencing ‘[word:0] [word:1] [word:2] would pick 3 words from the list.


Basic Exercise 4 E-Data Aid Study QuestionsBasic Exercise 4 E-Data Aid Study QuestionsCould you at this point? Could you at this point?

1.1. Filter reaction times to be greater than 200 and less than 2000 ms?Filter reaction times to be greater than 200 and less than 2000 ms? Use the Use the Filter option in E-Data Aid and select the and condition that Probe.RT> Filter option in E-Data Aid and select the and condition that Probe.RT> 200 AND Probe.RT<2000200 AND Probe.RT<2000

2.2. Plot the accuracy data across conditions. Plot the accuracy data across conditions. Plot Mean Probe.AC as a Plot Mean Probe.AC as a function of condition and output the plot to Excel. function of condition and output the plot to Excel.

3.3. Plot RTs by Block number to look at sequential effects? Plot RTs by Block number to look at sequential effects? Use the calculate Use the calculate and graph options in E-DataAid to create an Excel graph of Probe.RT as a and graph options in E-DataAid to create an Excel graph of Probe.RT as a function of Block (since this experiment repeated the Block level for each function of Block (since this experiment repeated the Block level for each Probe, the Block provides the sequential number. Probe, the Block provides the sequential number.

4.4. How would you output the data to a program such as Excel or SPSS. How would you output the data to a program such as Excel or SPSS. Use Use the File/Export option of E-DataAid to export the data. Note it would be the File/Export option of E-DataAid to export the data. Note it would be good to first filter the columns to those that you need before exporting. good to first filter the columns to those that you need before exporting.


Basic Exercise 5 Slide Study QuestionsBasic Exercise 5 Slide Study Questions

Could you at this point? Could you at this point?

1.1. Use an attribute to set the picture in Slide1 and the position of the text in Use an attribute to set the picture in Slide1 and the position of the text in Slide 2 and have only the default state and still execute the same Slide 2 and have only the default state and still execute the same experimiment? experimiment? You could copy the sound, bitmap, and text objects from the You could copy the sound, bitmap, and text objects from the Left to the default panel of the Slide1 and Slide2 object. To change the Left to the default panel of the Slide1 and Slide2 object. To change the bitmap, put the attribute name of the [StateName].bmp for the bitmap object bitmap, put the attribute name of the [StateName].bmp for the bitmap object to select the correct bitmap on the General Tab on Slide1 and Slide2 to to select the correct bitmap on the General Tab on Slide1 and Slide2 to Default. You would need to add a new attribute to the DesignList for an Default. You would need to add a new attribute to the DesignList for an attribute TextPostion and set the values of 140 and 487 for the Frame attribute TextPostion and set the values of 140 and 487 for the Frame Position X variable for the Text1 object on Slide2. Position X variable for the Text1 object on Slide2.

2.2. Present the Slide 1 for only 50 ms but have the sound continue for 100 ms. Present the Slide 1 for only 50 ms but have the sound continue for 100 ms. The slide object terminates the sound when the duration of the object is The slide object terminates the sound when the duration of the object is exceeded so it can not be used in this mode. You can however put in a exceeded so it can not be used in this mode. You can however put in a Sound object before the Slide1 on the TrialProc and set the Duration to 0. Sound object before the Slide1 on the TrialProc and set the Duration to 0. The sound will continue through and beyond the slide object if no other The sound will continue through and beyond the slide object if no other objects use the sound output. objects use the sound output.


Timing Exercise 1 Short Display QuestionsTiming Exercise 1 Short Display QuestionsCould you at this point answer these questions?Could you at this point answer these questions?1.1. What would expect if you ran this exercise on a 100 Hertz monitor if it is set up What would expect if you ran this exercise on a 100 Hertz monitor if it is set up

for a 60 Hertz monitor? for a 60 Hertz monitor? If the monitor was at 100 Hz the expected times would be If the monitor was at 100 Hz the expected times would be the nearest refresh at 100 Hz rounded up 17 ms would be 20, 33ms would be 40 the nearest refresh at 100 Hz rounded up 17 ms would be 20, 33ms would be 40 and 50 would be 50ms. and 50 would be 50ms.

2.2. What if the PreRelease were set to 0 what would you expect the times to be on a 60 What if the PreRelease were set to 0 what would you expect the times to be on a 60 Hertz monitor? Hertz monitor? Results would depend on the speed of the monitor. In general you Results would depend on the speed of the monitor. In general you would expect to add one refresh rate to the display time (17ms would be 33ms). would expect to add one refresh rate to the display time (17ms would be 33ms).

3.3. What if you set the timing mode to be cumulative with prerelease rather then event What if you set the timing mode to be cumulative with prerelease rather then event mode? mode? The average time would be the expected time but individual times might The average time would be the expected time but individual times might vary by a refresh. vary by a refresh.

4.4. How might you put in code to detect if the times were different from the intended How might you put in code to detect if the times were different from the intended time by more than a millisecond and log the problem?time by more than a millisecond and log the problem? Use an If statement and set Use an If statement and set an attribute with c.SetAttrib function covered in code exercises.an attribute with c.SetAttrib function covered in code exercises.

5.5. How might you put in code to be sure that the program is running on a 60 Hertz How might you put in code to be sure that the program is running on a 60 Hertz monitor? monitor? Put in an if statement checking the attribute Display.RefreshRate Put in an if statement checking the attribute Display.RefreshRate converting it to an integer and checking if it is within some window of the desired converting it to an integer and checking if it is within some window of the desired time (e.g. If Cint(c.GetAttrib(“Display.RefreshRate”)) >59 and time (e.g. If Cint(c.GetAttrib(“Display.RefreshRate”)) >59 and Cint(c.GetAttrib(“Display.RefreshRate”)) < 61 Then execute experiment.Cint(c.GetAttrib(“Display.RefreshRate”)) < 61 Then execute experiment.


Timing Exercise 2 Cumulative TimeTiming Exercise 2 Cumulative Time

Could you at this point?Could you at this point?

1.1. Specify when to use Cumulative Time and Event Time Specify when to use Cumulative Time and Event Time methods?methods?

2.2. Analyze the timing of a cumulative experiment and Analyze the timing of a cumulative experiment and report accurately the timing precision in a journal report accurately the timing precision in a journal article?article?

3.3. Specify the disadvantage of using PreRelease and Specify the disadvantage of using PreRelease and when must you be careful about it?when must you be careful about it?



Timing Exercise 3 Caching QuestionsTiming Exercise 3 Caching Questions


1.1. Specify the range of display times in which prerelease Specify the range of display times in which prerelease is sufficient for the computer to keep up and caching is is sufficient for the computer to keep up and caching is not necessary?not necessary?

2.2. Determine the maximal rate at which you could Determine the maximal rate at which you could display images before the computer can not keep up?display images before the computer can not keep up?

3.3. Add new images to TimingParadigm 5 to allow rapid Add new images to TimingParadigm 5 to allow rapid presentation of those images?presentation of those images?



Code Exercise 1 Help Study QuestionsCode Exercise 1 Help Study Questions


1.1. Use the Help to find how to declare an integer type variable? Use the Help to find how to declare an integer type variable? Use the Help Index to find “Integer” Use the Help Index to find “Integer” to fine the to fine the Integer (data Integer (data type).type).

2.2. Find the syntax and an example of the IF command? Use the Find the syntax and an example of the IF command? Use the help index to find the help index to find the If...Then...Else (statement). If...Then...Else (statement).

3.3. Find a command to examine a command what would allow you Find a command to examine a command what would allow you to pick a member of a text string “red,green,blue,black” with an to pick a member of a text string “red,green,blue,black” with an index to pick the correct word? index to pick the correct word? Use the Help Contents to fine Use the Help Contents to fine the command categories, look through the String functions and the command categories, look through the String functions and locate the Item$ (function). locate the Item$ (function).

4.4. Determine how to exit a subroutine early? Determine how to exit a subroutine early? Type in Exit in the Type in Exit in the index find the Exit Sub (statement). index find the Exit Sub (statement).


Code Exercise 2 Properties Study QuestionsCode Exercise 2 Properties Study Questions

Could you at this point set properties of objects?Could you at this point set properties of objects?

1.1. Change the font to bold? Change the font to bold? Add code Probe.FontBold = Add code Probe.FontBold = Random(0,1)Random(0,1)

2.2. Change background colors of the display? Change background colors of the display? Add code Add code Probe.BackColor = ccolor(Item$Probe.BackColor = ccolor(Item$("Red,Green,Blue",Random(1,3))) ("Red,Green,Blue",Random(1,3)))

3.3. Set the X position of the Fixation display to be the same as the Set the X position of the Fixation display to be the same as the Probe? Probe? Move the code to in front of the Fixation object, store Move the code to in front of the Fixation object, store the position in a local variable the position in a local variable

ProbePos = Random (1,4)*100)ProbePos = Random (1,4)*100)

Fixation.x =ProbePos Fixation.x =ProbePos

Probe.Probe. X = ProbePosX = ProbePos


Code Exercise 3 Program Control QuestionsCode Exercise 3 Program Control Questions


1.1. Add a loop to present the square in Add a loop to present the square in #CodeExercise3-FlowControl to #CodeExercise3-FlowControl to make the square move up for 1000 iterations, down and be a circle for 1000 make the square move up for 1000 iterations, down and be a circle for 1000 iterations, and move horizontally and be an oval. iterations, and move horizontally and be an oval. Add to the If Else of the Add to the If Else of the final form of CodeExercise3-FlowControl changing how the x and y are final form of CodeExercise3-FlowControl changing how the x and y are updated and use calls to canvas.circle and canvas.oval. updated and use calls to canvas.circle and canvas.oval.

2.2. Find other program control commands and implement a While…When, Find other program control commands and implement a While…When, Do…Loop or Case process. Do…Loop or Case process. Find the listing of commands on the E-Basic Find the listing of commands on the E-Basic help Welcome page. Look up the commands, study the example, then help Welcome page. Look up the commands, study the example, then implement simple versions.implement simple versions.

3.3. Specify how to leave a For loop early (not covered in exercise but in Specify how to leave a For loop early (not covered in exercise but in lecture). lecture). Use the Exit For command that can be found by finding the listing Use the Exit For command that can be found by finding the listing of commands on the E-Basic help Welcome page.of commands on the E-Basic help Welcome page.


Code Exercise 4 Attributes QuestionsCode Exercise 4 Attributes QuestionsCould you at this point?Could you at this point?1.1. Use Code to set the attribute of font color based on the Condition? Use Code to set the attribute of font color based on the Condition?

Use code to set an attribute (Use code to set an attribute (c.SetAttrib “TextColor”, “red”c.SetAttrib “TextColor”, “red” ) and ) and reference the attribute on the object being changed (set ForeColor reference the attribute on the object being changed (set ForeColor to [TextColor]). to [TextColor]).

2.2. Explain the difference in using code to set property of the attribute Explain the difference in using code to set property of the attribute using the [attribute] syntax on a property of an E-Studio object (as it using the [attribute] syntax on a property of an E-Studio object (as it TextDisplay)? TextDisplay)? The property code sets the object properly directly. The property code sets the object properly directly. Setting an attribute sets a variable in the context that must later be Setting an attribute sets a variable in the context that must later be referenced using the [attribute] syntax to set the property. The referenced using the [attribute] syntax to set the property. The attributes are also logged at the end of the procedure.attributes are also logged at the end of the procedure.

3.3. Predict what would happen if an attribute is set multiple times in the Predict what would happen if an attribute is set multiple times in the same procedure? Aftersame procedure? After the attribute is set in can be read from the the attribute is set in can be read from the context. If set multiple times only the most recent setting is used. context. If set multiple times only the most recent setting is used. The final setting at the end of the procedure is what is logged for The final setting at the end of the procedure is what is logged for later analysis. later analysis.


Code Exercise 5 Debug.Print Study Code Exercise 5 Debug.Print Study QuestionsQuestions


1.1. Output the Condition Attribute? Output the Condition Attribute? Add Add

& “\tCondition\t” & c.GetAttrib(“Condition”)& “\tCondition\t” & c.GetAttrib(“Condition”)

2.2. If you had a fast loop presenting stimuli every 14 ms If you had a fast loop presenting stimuli every 14 ms how might you debug.print to see what the stimuli how might you debug.print to see what the stimuli were?were?

3.3. If you had a 2 monitor computer and you ran the If you had a 2 monitor computer and you ran the experiment on the primary monitor and the Output experiment on the primary monitor and the Output window on the second monitor, what do you think you window on the second monitor, what do you think you would see during the run? would see during the run?



Code Exercise 6 Cumulative Data CollectionCode Exercise 6 Cumulative Data Collection


1.1. Add a cumulative trial counter informing the subject Add a cumulative trial counter informing the subject that this is trial [trialcounter] of the maximum number that this is trial [trialcounter] of the maximum number of trials?of trials?

2.2. Have a practice block where the task is easier and Have a practice block where the task is easier and subjects continue till they reach 90% accuracy before subjects continue till they reach 90% accuracy before moving on?moving on?



Code Exercise 7 Port I/O QuestionsCode Exercise 7 Port I/O Questions


1.1. Turn on the lights differentially reporting accuracy Turn on the lights differentially reporting accuracy green on correct and red on wrong?green on correct and red on wrong?

2.2. Terminate a block when the black box button is Terminate a block when the black box button is pushed?pushed?

3.3. Output a string of bits one every 20 ms.Output a string of bits one every 20 ms.



Code Exercise 8 Onset SynchCode Exercise 8 Onset Synch


1.1. Set the onset synch to report when the fixation Set the onset synch to report when the fixation occurred with a 1 code, when the stimulus occurred occurred with a 1 code, when the stimulus occurred with a 2 code?with a 2 code?

2.2. Change the data signal to reflect what stimulus was Change the data signal to reflect what stimulus was presented?presented?



Code Exercise 9 Frame Loop QuestionsCode Exercise 9 Frame Loop Questions


1.1. Add a fixation stimulus to the loop in Add a fixation stimulus to the loop in #CodeExercise9Loop?#CodeExercise9Loop?

2.2. Add code to exit the loop when the subject makes a Add code to exit the loop when the subject makes a correct response?correct response?



Code Exercise 10 ReSampling QuestionsCode Exercise 10 ReSampling Questions


1.1. Modify #CodeExercise10-Resample to have four Modify #CodeExercise10-Resample to have four conditions and make sure there are no repetitions?conditions and make sure there are no repetitions?

2.2. Copy the subroutine from #CodeExercise10-Resample Copy the subroutine from #CodeExercise10-Resample to another program so you could use the to another program so you could use the ManuallySampleList in another program. ManuallySampleList in another program.
