Delay between trials in sequence
I'm currently working on my first experiment (SC-IAT) with OpenSesame (PsychoPy backend) and need some help with timing issues.
The experiment consists of 3 block loops, each containing a sequence with stimuli presenting trials. Subjects have to react by pressing certain keys in response to the stimulus. The process is running quite smoothly (adopted it from the beginners tutorial). Just the ITI is causing some trouble.
I inserted a sketchpad with a delay of 245ms (to get 250ms) at the beginning of the sequence. This is working quite precisely. Analysis of the test data delivers averages of 250-254ms.
However, there is a rather long delay between the last item in the sequence (logger) and the onset of the ITI sketchpad item of the next trial. Unfortunately this is highly variable (500-1000ms), i.e. I can not take this delay into account in the ITI item.
Any idea if/how I can fix this?
Thanks in advance