Record responses continuously over several trials (case 21114)

[kitty_mimo]

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

[jason_reed]

You can put the 5 consecutive images on the same row of the .csv input file. You can also create a blank screen betwen them by simply typing ~ into a stim cell of that row. You can control the presentation time of the blank screen and allow for screen presses in the same way that you used for the images.

Furthermore, you can use the metacommand feature to limit the timing of that entire row. Take a look at this section of the DirectRT manual for information about the metacommand feature: http://www.empirisoft.com/directrt/h...a_commands.htm