URL of experiment: PopoutStudy [PsychoPy] Description of the problem: Hello, I have an online experiment that needs to show a lot (768) of visual.rect in each trial. The whole experiment works fine on my laptop. However, starting from some point of the experiment, it fails to load the visuals and j…

How often are you creating new rectangles? [image] Wakefield's Daily Tips Blog Reuse your visual objects Similar to Wakefield's Daily Tips - #7 by wakecarter . If you use visual components, then they are all created during Begin Experiment and then updated as …

I create rects in beginRoutine at the outside of the loop of trials. My experiment has multiple ‘blocks’ and each block has 8 trials. The rects are created at the beginning of a block. In beginRoutine of each trial routine, I change rects’ pos, color, etc. And then setAutoDraw true, and then setAuto…

If it only happens once, that should be fine. I just tried it and there was a delay between the space bar and the numbers appearing. Is that intentional. If it’s caused by the randomisation of the numbers, that could be done earlier. It didn’t go blank after the practice plus 5 or so trials.

Thank you! The delay is not intentional. I want it to appear immediately. The numbers are not generated from randomization. It’s read from csv files. The numbers and the position of rects are all from csv files. Is there a way to help the delay?

Is there a start of a loop at that point? Please could you show what this bit looks like in the flow.

And when it happens, all the following trials won’t show stimuli anymore (it still shows numbers after ‘space’ is pressed). So the study will stuck because of this

[Screenshot 2025-02-27 135343] This is my flow in psychopy. Rects are created in the beginRoutine of ‘blockInstr’. ‘trials’ loops 8 trials, trials_3 if for wrong answers, trials_2 loops all blocks

And rects are setAutoDraw(true) in beginRoutine of ‘gen_stimu’; numbers are setAutoDraw(true) in beginRoutine of ‘verification’

[image] weifan: Rects are created in the beginRoutine of ‘blockInst Does that mean they get recreated every iteration of trials_2? You said they were only created once. The delay must be in End Routine of gen_stimu or Begin Routine of verification. Any suggestions for code that might take a …

I just find It’s not caused by rects! I deactivate the ‘verification’ and ‘feedback’ routine and it works perfectly this time, no blank page, no delay. So the issue is actually related to text rendering because I set all the numbers autoDraw in ‘verification’ Here is how I render the numbers in ‘bl…

Online study stops to show stimuli with a lot of rects

Online experiments

wakecarter February 27, 2025, 11:22am 2

How often are you creating new rectangles?

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Online study stops to show stimuli with a lot of rects

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