List of duration

Builder
1

So I want to make a list of duration for the Inter-stimuli interval for RSVPs streams. I ran the experiment and saw this error. I am trying to have PsychoPy pick a specific value for time duration. Here’s the list of duration: 50 ms, 100 ms, 150ms. I did not know what that error means. I was wondering if someone can help me with this error.

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Here’s the code I wrote for the duration.

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2

Every time you pop from a list it gets shorter until the length gets to zero. If you try to pop another valve from it you then get the error.

Either your list is shorter than you think or you are popping from it more times than you expected.