+xHi Dave,
I want to add a 500ms fixation cross to the start of every trial for this script:
<trial UU_prac_green>
/ ontrialbegin = [values.primecategory="Unpleasant"; values.targetcategory="Unpleasant"]
/ ontrialbegin = [
values.primeitemnumber = list.UU_prac_primes.nextvalue;
values.targetitemnumber = list.UU_prac_targets.nextvalue;
]
/ ontrialbegin = [trial.UU_prac_green.insertstimulustime(shape.eraser, (values.primeduration))]
/ ontrialbegin = [trial.UU_prac_green.insertstimulustime(text.UnpleasantTarget, (values.primeduration + values.pt_isi))]
/ ontrialend = [trial.UU_prac_green.resetstimulusframes()]
/ stimulustimes = [0 = CSNegPrimes_green]
/ beginresponsetime = values.primeduration + values.pt_isi
/ responseinterrupt = immediate
/ monkeyresponse = (18, 23)
/ isvalidresponse = [trial.UU_prac_green.response==values.responsekeyUnpleasant || trial.UU_prac_green.response == values.responsekeyPleasant]
/ iscorrectresponse = [trial.UU_prac_green.response == values.responsekeyUnpleasant]
/ ontrialend = [values.prime = picture.CSNegPrimes_green.currentitem; values.target = text.UnpleasantTarget.currentitem]
/ posttrialpause = values.iti
/ errormessage = true(errorfeedback, 500)
</trial>
How do I do this? I created a text element then tried to insert it before the / ontrialbegin = [trial.UU_prac_green.insertstimulustime(shape.eraser, (values.primeduration))] line but the closest I could get was showing a fixation cross, followed by the target stimulus without the prime showing in between.
Thanks,
Luke
If you want it in every trial, you need not use /ontrialbegin. Simply add the thing to the <trial>'s /stimulustimes:
/ stimulustimes = [0 = fixation; 500=CSNegPrimes_green]
with
<text fixation>
/ items = ("+")
...
</text>
and make sure you adjust the remaining timings accordingly. I.e., you'll want to shift any inserted stimuli by 500ms
<trial UU_prac_green>
/ ontrialbegin = [values.primecategory="Unpleasant"; values.targetcategory="Unpleasant"]
/ ontrialbegin = [
values.primeitemnumber = list.UU_prac_primes.nextvalue;
values.targetitemnumber = list.UU_prac_targets.nextvalue;
]
/ ontrialbegin = [trial.UU_prac_green.insertstimulustime(shape.eraser, (values.primeduration
+ 500))]
/ ontrialbegin = [trial.UU_prac_green.insertstimulustime(text.UnpleasantTarget, (values.primeduration + values.pt_isi
+ 500))]
/ ontrialend = [trial.UU_prac_green.resetstimulusframes()]
/ stimulustimes = [0 = fixation; 500=CSNegPrimes_green]
/ beginresponsetime = values.primeduration + values.pt_isi
+ 500/ responseinterrupt = immediate
/ monkeyresponse = (18, 23)
/ isvalidresponse = [trial.UU_prac_green.response==values.responsekeyUnpleasant || trial.UU_prac_green.response == values.responsekeyPleasant]
/ iscorrectresponse = [trial.UU_prac_green.response == values.responsekeyUnpleasant]
/ ontrialend = [values.prime = picture.CSNegPrimes_green.currentitem; values.target = text.UnpleasantTarget.currentitem]
/ posttrialpause = values.iti
/ errormessage = true(errorfeedback, 500)
</trial>