I try to implement some kind of a face in the crowd task. I've seen a lot of that kind of script but none of them fits mine. In every trial, Participant has to indicate 1 of 4 faces presented on a matrix by clicking on it.
Previously, I assigned specific keys to image position in a matrix (e.g. "w" for 1, "e" for 2, etc.) and marked them on a keyboard but because of switching from stationary lab to online study, I would prefer to change this "technique".
I would like to set a response as a mouse click on a chosen pic, e.g. participant wants to choose face 2 (in the matrix) so just clicks on this particular face (+ it would be saved as "2" in my results). Additionally, It would be great if the face (box) that participant has a cursor on it (in that particular moment) was illuminated.
I guess that I need to add some kind of "shape" or "mask" but have no idea where and how. My script is very basic: item -> picture -> trial -> block with 80 noreplace trials.
Thank You for all your help!
Typical matrix (it's one picture item, not 4 separate images):