Millisecond Forums

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lukasg - 1/27/2022

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lukasg - 1/27/2022

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Dave - 1/27/2022

One unrelated remark:
Assuming all your trials are basically identical *except* for the on-screen duration of the digits/target/distracors array, e.g.

/stimulustimes = [0 = clearscreen, fixation; 150 = clearscreen,t, d1, d2 , dig1, dig2; 350 = clearscreen] // 200ms

vs.

/stimulustimes = [0 = clearscreen,fixation; 150 = clearscreen,t, d1, d2 , dig1, dig2; 400 = clearscreen] // 250ms

etc.

you can save yourself a lot of essentially redundant code by having only a single stimulus presentation trial and inserting the final clearscreen stimulus programmatically per insertstimulustime(). https://www.millisecond.com/support/docs/v6/html/language/functions/insertstimulustime.htm

I.e.

<trial presentationTrial>
/ ontrialbegin = [
    trial.presentationTrial.resetstimulusframes();
    trial.presentationTrial.insertstimulustime(clearscreen, 150 + values.targetarrayduration);
    ...
]
/stimulustimes = [0 = clearscreen, fixation; 150 = clearscreen,t, d1, d2 , dig1, dig2;]
...
</trial>

whith values.targetarrayduration set to the desired value for the given block (i.e. 100, 150, 200, etc.).

Great, this seems much more efficient but it messes up the stimulus presentation somehow. I have done this:

<expt IC>
/ blocks = [1 = 250ms]
</expt>


<block 250ms>
/ trials = [1-5 = conjunctionTrial]
/ onblockbegin = [
    values.targetDuration = 250
]
</block>



<openended conjunctionTrial>

/ recorddata = false

/ ontrialbegin = [
    
    openended.conjunctionTrial.insertstimulustime(clearscreen, 150 + values.targetDuration);
    openended.conjunctionTrial.insertstimulustime(enterdig, 150 + values.targetDuration);
    
    // select digit items
    values.dig1 = list.digits.nextvalue;
    values.dig2 = list.digits.nextvalue;
// select target item
values.t = list.t_items.nextvalue;
// select distractor items
values.d1 = list.d_items.nextvalue;
values.d2 = list.d_items.nextvalue;
// select target position
values.t_x = list.t_x.nextvalue;
// select distractor positions
values.d1_x = list.d_x.nextvalue;
values.d2_x = list.d_x.nextvalue;
// select target color
values.t_color = list.t_colors.nextvalue;
// and corresponding response key

// combine digits
    values.correctdigit = concat(values.dig1, values.dig2);

// select distractor colors
values.d1_color = list.d_colors.nextvalue;
values.d2_color = list.d_colors.nextvalue;
    
]

/stimulustimes = [0 = clearscreen, fixation; 150 = clearscreen, t, d1, d2 , dig1, dig2;]
    
/ mask = positiveinteger
/ beginresponsetime = 150 + values.targetDuration
/ mask = positiveinteger
/ charlimit = 2

/ correctresponse = (values.correctdigit)

/ branch = [trial.colorResponse]

/ ontrialend = [
    // save data
    
    values.latencyDigit = openended.conjunctionTrial.latency;
    values.digitResponse = openended.conjunctionTrial.response;

    values.digPropCor = openended.conjunctionTrial.percentcorrect;
    values.digLatAvg = openended.conjunctionTrial.meanlatency;

// reset relevant lists for next trial
list.d_items.reset();
list.d_x.reset();
list.d_colors.reset();
]

</openended>

To clarify, on the 'colorResponse' trial, a response field covers parts of the displayed shaped. I do run 'clearscreen' and do not understand where this comes from

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lukasg - 1/27/2022

To clarify, on the 'colorResponse' trial, a response field covers parts of the displayed shaped. I do run 'clearscreen' and do not understand where this comes from

+x

 

lukasg - 1/27/2022

+x

 

lukasg - 1/27/2022

To clarify, on the 'colorResponse' trial, a response field covers parts of the displayed shaped. I do run 'clearscreen' and do not understand where this comes from

After some trial-and-error I figured the errors only occurs when the trial 'colorResponse' is openended. Although I fixed the issue, I am curious about my clear misunderstanding of the openended trial. What am I getting wrong here, after all, I do want an openended response?

Thanks in advance, Dave!