Hi,

I try to change one thing in a script that I created and used for study, but it's doesn't works and I don't undestrand why. 

I want to add a trialduration (1000 ms) on my actual trail (Go), but when I add the line /trialduration = 1000 in my trial, Inquisit told my that I do a mistake.

There is my trial :

<trial Go>
/ ontrialbegin = [
     values.gotype = list.Go.nextvalue;
     values.trialcount+=1;

if (parameters.runRandomITI == true){
values.ITI = list.intertrialIntervals.nextvalue;
} else {
values.ITI = parameters.fixedITI;
};

   trial.Go.insertstimulustime(picture.X, (values.ITI));
  trial.Go.insertstimulustime(clearscreen, (values.ITI + parameters.pictureDuration));
]

/ stimulustimes = [0 = clearscreen]
/ beginresponsetime = values.ITI
/ response = timeout(parameters.RW)
/ validresponse = (57, noresponse)
/ correctresponse = (57)
/ response = timeout(parameters.RW)
/ trialduration = 1000

/ ontrialend = [
 list.accuracy.insertitem(trial.Go.correct, 1);
 list.accuracy_G.insertitem(trial.Go.correct, 1);
 
 if (trial.Go.correct)
{
list.latencies.insertitem(trial.Go.latency, 1);
list.latencies_G.insertitem(trial.Go.latency, 1);
};
values.itempic = picture.X;
trial.Go.resetstimulusframes();
]
/ recorddata = true

</trial>

My script works well without the "trialduration". I just need that the stimulus "Go" appear for 500 ms and 500ms before the next stimulus. I hope you could help me.

Thanks in advance,
Best

Margaux

Please provide the full script as well as the exact wording of the actual error message. The code snippet you posted is not sufficient to determine where your mistake is. I'll note that you have several possibly contradictory parameters in the trial limiting its duration:
Two /response attributes with a timeout and the /trialduration

/ stimulustimes = [0 = clearscreen]
/ beginresponsetime = values.ITI
/ response = timeout(parameters.RW)
/ validresponse = (57, noresponse)
/ correctresponse = (57)
/ response = timeout(parameters.RW)
/ trialduration = 1000