Rescorla-Wagner theory

n. A formal theory describing classical conditioning in terms of the discrepancy between expectation, which is the sum of all previous conditioning, and actual experience. This formula for change in associative strength on any one trial is \(V_A/n = L_A B_{US}/n (G_{US}/n – V_{ALL}/n\)), where \(V\) is the associative strength, \(A\) is the conditioned stimulus, \(n\) is the trial number, \(L\) is the learning rate parameter for the unconditioned stimulus, \(G\) is the asymptote of learning supported by the unconditioned stimulus, and \(V_{ALL}/n\) is the net associative strength of all stimuli present in the trial.