Precise presentation time of polygon

[bets]

In my experiment, 8 lines are shown on the screen for 33 ms. I feel that it is displayed longer even though I set the duration to 33 ms. How can I check the precise presentation time?

[wakecarter]

Is there anything else in the routine?

You could start a custom clock

myClock = new core.Clock() in Begin Experiment

print(‘before’,myClock.getTime())

in Begin Routine and

print(‘after’,myClock.getTime())

in End Routine

[bets]

Thank you for helping. Yes, there are other components in the routine.

[wakecarter]

If you are running it locally then the data file will contain the onset and offset times of the components if you don’t untick that option.

[bets]

Thank you. Is there a way to check in pavlova? Because it seems to be slowing down.

[JensBoelte]

Hello bets

take a look into The timing mega-study: comparing a range of experiment generators, both lab-based and online [PeerJ] to see what you can expect online.

Best wishes Jens

[Becca]

stim start and stop times aren’t saved automatically online. you could try this though Save onset offset time 2020.2.10 online - #2 by Becca (no need to refer to the crib sheet for the thisExp snippet anymore though, it’s fine in the current release)