Millisecond Forums

Hello,

I tweaked the Simon task from the Inquisit library to increase the number of test blocks (from 1 to 3) and the number of trials w/ in each block (from 28 to 60). As in the original, 50% of trials are congruent and 50% incongruent. Here, incongruent means either a blue box appears on the right side of the screen or a red box appears on the left side of the screen. What's odd is that when I run the task, all the trials appear as incongruent, with no congruent ones, but the raw data files say that it's tracking both types of trials, 50/50. Comparing the two scripts - the original and mine - I can't seem to find the line of code which may be causing the error. I've included the line of code that I adapted where the lists and trials are specified.

Thanks!


################ test block - 30 congruent trials ##################

<list congruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>

<list congruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.congruentstimtype.currentindex
</list>

<list congruentcresp>
/ items = (42,42,42,42,42,42,42,42,42,42,42,42,42,42,42,54,54,54,54,54,54,54,54,54,54,54,54,54,54,54)
/ selectionmode = list.congruentstimtype.currentindex
</list>

################ test block - 30 incongruent trials ##################

<list incongruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>

<list incongruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.incongruentstimtype.currentindex
</list>

<list incongruentcresp>
/ items = (42,42,42,42,42,42,42,42,42,42,42,42,42,42,42,54,54,54,54,54,54,54,54,54,54,54,54,54,54,54)
/ selectionmode = list.incongruentstimtype.currentindex
</list>

#########################congruent stim trial ########################

<trial congruenttrial>
/ ontrialbegin = [if(script.currentblock=="practiceblock")
    {
    values.stimtype=list.pcongruentstimtype.nextvalue;
    values.stimhpos=list.pcongruenthpos.nextvalue;
    values.cresp=list.pcongruentcresp.nextvalue;
    }
    else
    {
    values.stimtype=list.congruentstimtype.nextvalue;
    values.stimhpos=list.congruenthpos.nextvalue;
    values.cresp=list.congruentcresp.nextvalue;
    }]
/ posttrialpause = 500
/ stimulustimes = [0=fixation; 800=blank; 1050=stimulus,debug]
/ validresponse = (42,54)
/ iscorrectresponse = [trial.congruenttrial.response==values.cresp]
/ response = timeout(1000)
</trial>