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 processing speed and associative learning task requiring participants to match symbols with digits or letters with digits using a mapping key displayed on screen.

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.

Demonstration of Hick's Law showing that reaction time increases logarithmically with the number of response choices

A speed-accuracy tradeoff task based on Henmon (1910) where participants quickly discriminate which of two vertical lines is longer under varying deadline conditions.

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.

Mental arithmetic task requiring rapid addition of three two-digit numbers presented vertically