A simple choice reaction time task where participants type the letter displayed on screen as quickly as possible. Measures basic processing speed and response selection.

A four-choice serial reaction time task from the UTC test battery (Wilkinson & Houghton, 1975). A plus sign appears in one of four screen quadrants, and participants press the corresponding key as quickly as possible. Optional auditory feedback for lapses.

A simple reaction time task where a single stimulus (an 'X' or mouse button prompt) appears at a specifiable delay from the previous response. Measures basic alertness and motor response speed across multiple blocks with breaks.