US specificity of occasion setting: Hierarchical or configural learning?

摘要: Four experiments in rats examined whether occasion setters and target CSs play qualitatively different roles occasion-setting discriminations. Two visual setters, A B, signalled reinforcement of two auditory CSs, x y, with sucrose oil (A…x → suc, B…y oil, A−, B−, x−, y−); addition transfer w z were paired (w oil). When substituted for y (A…w, B…w, A…z, B…z) more responding was observed when both stimuli had been the same outcome (Experiments 1 3a). No effect “pseudo-occasion setters”, C D (paired a trace relation to US:C… D… oil), B (C…x, D…x, C…y, D…y; Experiments 2, 3b 4). These results could not be explained terms Pavlovian summation: combinations or outcomes either same, lower (Experiment Implications these theories setting configural learning are discussed.