Symbol λ

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…own parameters. A standard error-correction rule for associative strength states the update on each learning trial as $\Delta V = \alpha \,(\lambda - V)$. where V is the current associative strength between a stimulus and an outcome, $\lambda$ is the asymptotic strength that outcome supports, and $\alpha$ is a learning-rate parameter governing how much of the gap between the two is closed on a given trial. Preparedness theory’s defensible empirical content, on the evidence gathered across the last five sections, is that $\alpha$ is…

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