// multi-utility computation suite · offline · instant · precise
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sci.Hick-law-reaction-time Calculator
Calculates human reaction time from the number of equally probable choices using Hick-Hyman law: RT = a + b × log₂(n). Each doubling of choices adds a constant time ≈ 150 ms — menu design and emergency panel layouts optimise information architecture to minimise RT under stress.
Inputs
N Choices
Count of items or occurrences.
B Ms
Reference formula or conversion factor shown for context.
A Ms
Reference formula or conversion factor shown for context.
Results
reaction time RT (ms)
The computed duration or time value.
information load (bits)
The specific form or variant of the result.
RT if choices doubled (ms)
Reference formula or conversion factor shown for context.