Randomize pictures of same category
I'm programming an attentional task and I need some help.
The experiment has the following structure: distractor-target-response.
I have two different categories of distractors (food and neutral stimulus) and each one contains 40 pictures (food1, food2, ... / neutral1, neutral2, ...). The target can appear either the same position as the distractor (congruent trial) or the opposite position (incongruent trial).
Thank you so much for your help.