Thank you immensely for this response and your other response ( Trial Randomization + Inter-block Break - - #2 by wakecarter ). Your instructions worked perfectly, and it’s wonderful to see the task running as envisioned.
I have one additional question - I would like the color of the first stimulus (the randomized color wash) to match the color of the second stimulus. There isn’t a break between the two.
There are two sequences this would apply to:
A: Face_image w randomized colorwash for 0.033s + mask_image w same color wash for 0.167
B: Face_image w randomized color wash for 0.2s → placeholder/blank grey screen (pulls a grey screen from the same mask_image column in my excel file) for 0.001s (fine if the color wash remains)
In other words, the randomized color should be selected once per trial and then used consistently for both the face and the mask in that trial.