Fitts: MT = a + b·log₂(2A/W); ID(A=8,W=1)=4; doubling A or halving W → +1 bit ID

Layer 3 — Biologyin the cognitive-neuroscience subtree

Sympy-exact symbolic witness of Fitts' law movement-time canonical form and its doubling-precision +1-bit anchors. Setup: amplitude A, target-width W, intercept a, slope b — all positive symbols. ID (index of difficulty):…

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Explore Fitts: MT = a + b·log₂(2A/W); ID(A=8,W=1)=4; doubling A or halving W → +1 bit ID on the interactive knowledge graph →