Hi, I would like to use the subject's reponse in a previous trial as a stimulus in the next trial. Below is what I did according to the online tutorial, however something doesn't seem to work. Please let me know what I should do to make this work.

e.g. The possible responses in trial 2 are q, w, e, and r (rt: 16,17,18,19).
If the subject responds with 'q' (or w/e/r) in trial 2, he/she should see one of the images under stimlist 'q.txt' (or w.txt/e.txt/r.txt) in trial 3.
Accordingly I put '$=2' in the stim column for trial 3.
In trial 3, however, I do not get an image but simply a text-form stimulus ('Q').
All the images are under the relevant stim folder so it doesn't seem to be a problem with the path name.
Please help.



The location of the images are all under the relevant stim folder.