OS (e.g. Win10): Windows 10, Dell XPS 15
PsychoPy version (e.g. 1.84.x): 1.84 and tested on 1.82
Standard Standalone? (y/n) If not then what?: yes
What are you trying to achieve?: Displaying an 8 Hz flashing image for 10 seconds
What did you try to make it work?: Built analagous procedure in coder and it still didn’t come out to the correct timing. The build in builder is very simple and described below.
Created two image objects:
- The first started at 0.0 and went on for 0.0625 s
- The second started at 0.0625 and went on for 0.0625 s.
The block above was looped 80 times.
Theoretically, it should last for 10 seconds.
What specifically went wrong when you tried that?:
Nothing crashes - the code runs fine and repeats the proper number of times.
When timed with an externally, on average the stimulus only lasted for 9.3 seconds.
- Recording with OBS Studio and doing a frame by frame analysis it seems like the second image is being cut SHORT at times.
- At 10 Hz AND at 0.1 Hz, the image is timed perfectly when analyzed frame by frame and when timed externally.