Stimuli from previous trial flashing in subsequent trials

Online experiments
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1

Description of the problem:


There are 3 stimuli displayed in every trial and the task is to select the box in which the target stimuli may have occurred. However, in the presentation, in every trial before the 3 stimuli comes, the stimuli from the previous trial flashes for a very short period of time, which is not desirable. Any idea what might be causing this and possible solutions?

2

Are you setting the image every frame?

The issue is that the first frame uses the previous information.

The best option is probably to use imageComponentName.setImage(‘whiteNumberedSquareFileName’) in End Routine to reset the images.

3

Hi there,

I am having a similar problem,

URL of experiment: Psychopy Build [PsychoPy]

Description of the problem:
In my study when I display an image the previously presented image flickers before it is displayed. I have read the forum and seen that the problem occurred to many people before but I haven’t been able to find a solution yet.

It only occurs on pavlovia and I have tried:

  • Setting every repeat
  • an ISI after the image
  • Setting the routine to a max duration

I am displaying the photos in a random order. I am not changing its size, they are not presented directly one after another in the routine.

Any help would be greatly appreciated

4

I seem to have stumbled across a fix of setting my Text component 'Fixation" to set every repeat and that sorted the issue!