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ably because both hemispheres were jointly handicapped by the conflict between their respective contingencies of reinforcement; and there were strong differences between the learning rates of the two eyes, presumably because the two hemispheres were differentially sensitive to the unfavorable influence of the conflictual pattern of reinforcement. Like the effect of mnemonic load in the split-brain monkeys of Lewine and colleagues (1994), the effect of conflictual reinforcement in Mascetti's (1997) split-brain cats appears to depend on an information-processing mechanism that acts on both hemispheres in spite of their anatomofunctional disconnection at the cortical level. Though insufficient by itself to ensure interhemispheric transfer of visual discriminations in split-brain cats, this mechanism would nonetheless participate in the learning processes of both hemispheres, presumably by allowing them to share task-related contextual information.

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