+x+x+xHi,
I want to create an experiment such that the stimuli one participant sees are based off of a previous participants button responses. For example, if participant 1 chose the left button, participant 2 would see an image on the left side of the screen to also choose left. Is it possible to save out the responses from one participant from the data file to then use to create unique stimulus lists (or just positions on the screen for a given stimulus).
Let me know if I should clarify more.
Thanks!
> For example, if participant 1 chose the left button, participant 2 would see an image on the left side of the screen to also choose left. Is it possible to save out the responses from one participant from the data file to then use to create unique stimulus lists (or just positions on the screen for a given stimulus).
If you want that to happen immediately and automatically, e.g. on the web, no. If there's enough time for to put the responses logged for participant A into a usable format (i.e. proper Inquisit syntax), yes. The list of stimuli or positions derived from participant A's responses you can then load into the script for participant B by making use of (conditional) <include> elements. See e.g.
https://www.millisecond.com/forums/Topic19045.aspx or
https://www.millisecond.com/forums/Topic20057.aspx .
Thanks!
You can also have the "A" script prepare some of the formatting work for you. For example, the below code
<values>
/ itemnumbers = ""
/ positions = ""
</values>
<expt>
/ onexptend = [
values.itemnumbers = substring(values.itemnumbers, 1, length(values.itemnumbers));
values.itemnumbers = concat(concat("<list itemlist> /items=(", values.itemnumbers), ") /selectionmode=random </list>");
values.positions = substring(values.positions, 1, length(values.positions));
values.positions = concat(concat("<list positionlist> /items=(", values.positions), ") /selectionmode=list.itemlist.currentindex </list>");
]
/ blocks = [1 = myblock]
</expt>
<block myblock>
/ trials = [1-4 = mytrial]
</block>
<trial mytrial>
/ ontrialend = [
if (trial.mytrial.response == 203){
values.positions = concat(concat(values.positions, ","), "25%");
} else if (trial.mytrial.response == 205) {
values.positions = concat(concat(values.positions, ","), "75%");
};
values.itemnumbers = concat(concat(values.itemnumbers, ","), text.mytext.currentindex);
]
/ stimulusframes = [1=mytext]
/ validresponse = (203, 205)
</trial>
<text mytext>
/ items = ("A", "B", "C", "D")
</text>
<summarydata>
/ columns = (script.startdate, script.starttime, script.subjectid, script.groupid, script.sessionid
values.itemnumbers, values.positions)
</summarydata>
will write out the item numbers presented and the position indicated for each per the response given formatted as two paired <list> elements
which you could then just copy / paste into a template for use with <include>.