Hick's Law One colored button lights up — tap it as fast as you can. With more buttons, your brain needs more time to decide. Based on Hick (1952) and Hyman (1953): RT = a + b × log₂(n + 1).
Select Difficulty 2 buttons — establishes your simple RT baseline (1 bit of information)
30 trials · 3s timeout · ISI 500–1500ms
4 buttons — first major jump in information load (2 bits)
30 trials · 2.5s timeout · ISI 500–1500ms
6 buttons — 2.58 bits of information, noticeably slower RTs
32 trials · 2s timeout · ISI 500–1500ms
8 buttons — maximum 3 bits of information, significant slowing
35 trials · 1.8s timeout · ISI 500–1500ms
8 buttons, short ISI (200-800ms) — high information-processing demand
40 trials · 1.5s timeout · ISI 200–800ms