Find the unique target shape that differs from all the distractors as quickly as you can. Tap or click on the target item.
Example
Find the blue circle among the red circles. This is a feature search (Easy mode).
Easy
Feature search - target differs in ONE feature (pop-out)
4×4 grid • 12 trials
Medium
Conjunction search - target shares features with distractors
5×5 grid • 12 trials
Hard
Conjunction search - larger grid, more distractors
6×6 grid • 15 trials
Scientific Background
Based on: Visual Search Paradigm (Feature Integration Theory) (Treisman et al., 1980)