Images Do Not Appear When WGR is set to 1 when I randomize within groups (case 18899)

[adammagerman]

Hello All,

I am having this strange problem where trials will randomly not execute properly when I set the trial to WGR. If I make WGR 0 this does not occur.

In each normal trial a stimulus appears, the participant makes a decision and then they receive feedback. In every trial the participant is able to make the decision, but in random intervals the feedback will not appear. I checked the files/file names and everything is as it should be. I am not pulling from a list. And again, if i do not randomize this doesn't occur.

Edit: I should have mentioned that track performance says there were NO errors.

any help would be appreciated!!!

Best,

Adam