PsychoPy version: 3.6
Standard Standalone? (y/n): Anaconda env
What are you trying to achieve?
To present a dot stimulus with N=400 dots with the direction set every frame.
When I define a dot stimulus with 400 dots in the Builder mode, the presentation time (not the frame numbers) get stretched by 2x. So if I have a 60Hz monitor and I set the presentation time to 60 frames, the duration is ~2sec. If I lower it to the default 100 dots, this doesn’t happen. I’ve also played around with the dotlife time and the direction (that I wan to set every frame according to a coding element at the start of each trial), but this doesn’t seem to influence things. You can download a simplified code here to see it for yourself (that doesn’t make sense and is only for the purpose of testing the dotStim properties).
Is this problem known? Is there anything else I can do to make the presentation time accurate, because I would like to keep 400 dots per dot stimulus.