Brigette R Dorrance

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The 2-action method was used to examine whether imitative learning in Japanese quail (Coturnix japonica) depends on the motivational state of the observer quail at the time of observation of the demonstrated behavior. Two groups of observers were fed before observation (satiated groups), whereas 2 other groups of observers were deprived of food before(More)
In the present experiments, the 2-action method was used to determine whether pigeons could learn to imitate a conditional discrimination. Demonstrator pigeons (Columba livia) stepped on a treadle in the presence of 1 light and pecked at the treadle in the presence of another light. Demonstration did not seem to affect acquisition of the conditional(More)
Traditionally, it has been assumed that acquisition of a simultaneous discrimination results in an association between the S+ and reinforcement (excitation) and an association between the S and nonreinforcement (inhibition; Hull, 1943; Spence, 1936), and that no direct relation develops between the two discriminative stimuli. Interactions between these(More)
206 Recently, it has been demonstrated that when stimuli are presented in a simultaneous discrimination, the stimulus that is associated with reinforced responding (S ) transfers value to the stimulus that is associated with nonreinforced responding (S ; Dorrance, Kaiser, & Zentall, 1998; Zentall & Sherburne, 1994; Zentall, Sherburne, Roper, & Kraemer,(More)
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