Millisecond Forums » Millisecond Forums » Inquisit 4 » Setting new variables

Setting new variables

Fabiana — Wed, 29 May 2019 05:30:47 GMT

Hello,

I am currently working on a cross-cultural Old/New Face Recognition Task, I'd like to know how to set new variables to easily read the data once the experiment is completed.
I need to code the gender of the presented stimuli, their ethnicity and if the stimuli were familiar or unfamiliar. I also have to code the participant's gender and ethnicity.

I tried to set those variables on <values> and then with the /ontrialend attribute, but I am struggling to understand how to code to have them in my data file.

RE: Setting new variables

Dave — Wed, 29 May 2019 05:30:47 GMT

[quote]

[b]Fabiana - 5/28/2019[/b]

Thank you for the response, it really helped me.
But I think I didn't assign the values in the proper way because in the output file it returns only female Asian for all the stimuli.

<values>
/gender=1
/ethnicity=1
<values>

[/quote]

The <values> element you posted is not the relevant part. You need to make sure you have the <list> elements and /ontrialend logic down correctly:

<values>
/ gender = ""
/ ethnicity = ""
</values>

<block exampleblock>
/ trials = [1-4 = exampletrial]
</block>

<trial exampletrial>
/ ontrialend = [
values.gender = list.gender.nextvalue;
values.ethnicity = list.ethnicity.nextvalue;
]
/ stimulusframes = [1=examplestimulus]
/ validresponse = (57)
</trial>

<text examplestimulus>
/ items = exampleitems
/ select = noreplace
</text>

<item exampleitems>
/ 1 = "Face A (black male)"
/ 2 = "Face B (black female)"
/ 3 = "Face C (white male)"
/ 4 = "Face D (white female)"
</item>

<list gender>
/ items = ("male", "female", "male", "female")
/ selectionmode = text.examplestimulus.currentindex
</list>

<list ethnicity>
/ items = ("black", "black", "white", "white")
/ selectionmode = text.examplestimulus.currentindex
</list>

<data>
/ columns = [date time subject group blocknum blockcode trialnum trialcode stimulusitem response latency correct
values.gender values.ethnicity]
/ separatefiles = true
</data>

The list elements need to be paired to the face stimulus (cf. https://www.millisecond.com/support/docs/v4/html/howto/howtopairs.htm). Double check that part in your script and make sure it's correct.

RE: Setting new variables

Fabiana — Tue, 28 May 2019 22:41:27 GMT

RE: Setting new variables

Dave — Mon, 27 May 2019 05:39:15 GMT

[quote]

[b]Fabiana - 5/25/2019[/b]

[/quote]

Assuming you've managed to set the values you created properly, then all you need to log them is to specify them in your <data> element's /columns:

<values>
/ gender = ""
/ ethnicity = ""
</values>

<block exampleblock>
/ trials = [1-4 = exampletrial]
</block>

<trial exampletrial>
/ ontrialend = [
values.gender = list.gender.nextvalue;
values.ethnicity = list.ethnicity.nextvalue;
]
/ stimulusframes = [1=examplestimulus]
/ validresponse = (57)
</trial>

<text examplestimulus>
/ items = exampleitems
/ select = noreplace
</text>

<item exampleitems>
/ 1 = "Face A (black male)"
/ 2 = "Face B (black female)"
/ 3 = "Face C (white male)"
/ 4 = "Face D (white female)"
</item>

<list gender>
/ items = ("male", "female", "male", "female")
/ selectionmode = text.examplestimulus.currentindex
</list>

<list ethnicity>
/ items = ("black", "black", "white", "white")
/ selectionmode = text.examplestimulus.currentindex
</list>

<data>
/ columns = [date time subject group blocknum blockcode trialnum trialcode stimulusitem response latency correct
values.gender values.ethnicity]
/ separatefiles = true
</data>