Accepting a mouse click only within a ROI?
I am implementing an experiment where participants respond by clicking four times on four different buttons presented on screen. So I created a sketchpad with four different rectangles, and then I linked this sketchpad to four consecutive mouse_response items.
It all works fine, apart from the fact that participants may ignore the rectangles and click anywhere on the screen.
Is it possible to constraint the responses? To be more clear, I would like to accept a click as a legitimate response only if the position of the cursor lies within one of the four rectangles. Any suggestions?
Thank you all for your help,