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Direct linkMeeter, Martijn; Veldkamp, Rob; Jin, Yaochu – Brain and Cognition, 2009
Why does the brain contain more than one memory system? Genetic algorithms can play a role in elucidating this question. Here, model animals were constructed containing a dorsal striatal layer that controlled actions, and a ventral striatal layer that controlled a dopaminergic learning signal. Both layers could gain access to three modeled memory…
Descriptors: Animals, Operant Conditioning, Memory, Cognitive Processes
Grace, Randolph C.; McLean, Anthony P. – Journal of the Experimental Analysis of Behavior, 2006
Pigeons' choice in concurrent chains can adapt to rapidly changing contingencies. Grace, Bragason, and McLean (2003) found that relative initial-link response rate was sensitive to the immediacy ratio in the current session when one of the terminal-link fixed-interval schedules was changed daily according to a pseudorandom binary sequence (e.g.,…
Descriptors: Animals, Selection, Change, Adjustment (to Environment)
Nevin, John A.; Davison, Michael; Shahan, Timothy A. – Journal of the Experimental Analysis of Behavior, 2005
A model of conditional discrimination performance (Davison & Nevin, 1999) is combined with the notion that unmeasured attending to the sample and comparison stimuli, in the steady state and during disruption, depends on reinforcement in the same way as predicted for overt free-operant responding by behavioral momentum theory (Nevin & Grace, 2000).…
Descriptors: Behavior Theories, Behavior Problems, Stimuli, Probability
