Stim onset timing

Builder
1

Is there a way to present stimuli at times from a conditions file ?

I have a loop with 2 routines, each are 4 seconds in duration. I was hoping to make their start times (0,4,8,12,16,…), where routine1’s start times are (0,8,16,…) and routine2’s start times are (4,12,20,…).

I cannot seem to create a global variable that starts with the loop but tracks the remainder of the experiment. The reason I’d like to call start times from a conditions file is so that lags don’t accumulate across the whole experiment.

Thanks for any advice!

2

If you start a clock in Begin Experiment

myClock = coreClock()

and then reset it in End Routine just before your loop starts.

myClock.reset()

then you end your two routines in code instead of using the duriation

In Each Frame

if myClock.getTime() > (8*trials.thisN + 4):
     thisExp.addData('EndRoutine1'.myClock.getTime())
     continueRoutine = False

and

if myClock.getTime() > (8*trials.thisN + 8):
     thisExp.addData('EndRoutine2'.myClock.getTime())
     continueRoutine = False