Hi Jason,

Thanks a lot for your answer!

If I remember correctly, I did try having longer intervals but I had the same problem. The thing is that I need to record responses for 3000 ms, whereas the images are presented for only 400 ms each and separated by blanks lasting 200 ms. Therefore, I need responses to be recorded during the presentation of 5 consecutive images, including during the intervals separating the presentation of the images (5*400 + 5*200 = 3000). Is there a way that DirectRT can record responses between trials?

To answer your questions, I have 12 images that need to be presented 26 times each in a pre-determined order, for a total of 312 image presentations. The images are presented continuously without anything changing when the participant makes a response (except that the response needs to be recorded). Please see the attachment in my first message if you think it can help you understand my task.

Thanks a lot for your help!

Catherine