Millisecond Forums

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Jakob - 4/18/2020

I am rather self-taught in programming these experiments and tend to do things a bit unconventionally, sometimes. But maybe you can help me again (as you have done before).

I built a very complicated trial, which I want to “recycle” (repeat). That works perfectly fine using lists, except for storing/saving values within those trials.

In my script I run through the same block multiple times. With the help of lists, I can change the stimuli dynamically. But I do not know, how to dynamically save values, for a repeated block.

What I want: Save the value.current_click (similar to a counter) dynamically.
My approach: I have a list with the values

<list list_responses>
/items = (values.DRAWStrial1, values.DRAWStrial2, values.DRAWStrial3)
/selectionmode = (values.current_list)
</list>

<values>
/DRAWStrial1 = -88
/DRAWStrial2 = -88
/DRAWStrial3 = -88
</values>

Then, at the end of the block, I want to simply change the current value in the list. My most intuitive approach was /onblockend = [list.list_responses.nextvalue=values.current_click] but it says “the expression attempts to set the value of read-only property”:

<block someblock>
/trials = [1-12 = trial_choose]
/onblockend = [list.list_responses.nextvalue=values.current_click]
</block>

<expt>
/ blocks = [1-3= someblock]
</expt>

<summarydata>
/ columns = [values.DRAWStrial1, values.DRAWStrial2, values.DRAWStrial3]
</summarydata>

I tried other functions like

/onblockend = [list.list_responses.setitem(values.current_click, values.current_list)]

and

/onblockend = [ list.list_responses.item(values.current_list)=values.current_click]

Not always I get an error message, but it never saves the value.current_click to the values “stored” in my list list_responses to be saved in summarydata. The value always stays at the value -88 (pre-defined at the beginning of script).

Another idea I had was to create values somehow on the fly using dynamically created strings. For this I would need to convert my “list-counter” to a string, concatenate this to “value. DRAWStrial” and save the values.current_click to it.
Any help appreciated! Thanks a lot! 😊

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Jakob - 4/19/2020

Thank you very much for the fast reply. That would do the job. This is probably the best approach for Inquisit, I guess. Yet, I was looking for a more "dynamically approach", as I have ten or more trials, and per trial I want to save more than one value. That would mean lots of hardcoded lines. Thats why I came up the idea to use a list with values, trough which I am itterating with a counter (values.current_list) and to change the list's element (values) dynamically.

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Dave - 4/20/2020

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Jakob - 4/19/2020

Thank you very much for the fast reply. That would do the job. This is probably the best approach for Inquisit, I guess. Yet, I was looking for a more "dynamically approach", as I have ten or more trials, and per trial I want to save more than one value. That would mean lots of hardcoded lines. Thats why I came up the idea to use a list with values, trough which I am itterating with a counter (values.current_list) and to change the list's element (values) dynamically.

You can use <list>s, but there's no point in using values as the list's items.