Matching Pair is a processing speed test that challenges participants to identify and match identical shapes as quickly as possible. The 90-second task begins with a 2x2 grid of shapes. With correct matches, the task gets progressively more difficult both expanding the grid size (i.e., up to a 4x4 grid) and introducing more shapes. A brief tutorial prepares participants before the task, and users receive real-time audio and visual feedback for both correct and incorrect responses.