URL of experiment: GitLab ; Pavlovia ; RSVPexample.psyexp (abridged version of PsychoPy experiment) Description of the problem: I have an attentional blink experiment with a RSVP stream of images and the presentation timing lags every so often. The presentation method I’m using came from an old threa…

[image] sal: The method was from 2016/2017 (I really wish I bookmarked the thread) so maybe there’s a better way to go about this now? Thanks! I think that this is the post you mean and it was by @Michael [image] Preloading images on Builder? Builder OK, so it seem…

Yes you’re right thank you!! Sorry, I was looking at a lot of threads around the same time and forgot who solved this one. And I guess it wasn’t as old as I thought it was. So do you or @Michael know why the images might be lagging so bad every four trials?

I’m not sure why it would be multiples of four, but I feel that there is probably an overhead in having each frame as a new repeat of the routine. I’ve just copied my own Change Blindness RSVP experiment from December last year to my demo namespace so you can take a look at the code. The entry in my…

The thing that makes it difficult is that the images need to be consecutive (no blank screen between them) and there are 16+ images it has to cycle through. The first RSVP I made (back in May 2020) was with words so it worked fine with just updating the text each loop. However, it became difficult/l…

[image] sal: So I’m wondering if something was changed that might affect timing/loading of stimuli? For that we’d have to ask @thomas_pronk or @TParsons I don’t think my method would have a problem with the removal of the blank screens (that would simplify the code) or preloading of 16 image…

Edit: I’ve set up the experiment to use frames instead of time for the stimuli and that worked. It’s still strange that the time doesn’t work anymore though. Update on this: I’ve tried many things to get this to work, but it’s still very laggy in some points. A lot of the trials, it will just skip …

RSVP image presentation timing errors

Online experiments

wakecarter August 3, 2021, 8:03pm 2

I think that this is the post you mean and it was by @Michael

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RSVP image presentation timing errors

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