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Object retrieval by Norway rats consists of locomotion to an object, object seizure, carriage to a refuge and release. These studies examined choices in this sequence and object preferences (relative numbers retrieved) for objects varying in sweetness. In Experiment 1, rats could retrieve two types of object on each trial, drawn from a set of three, each placed in quantity in one arm of a Y-maze...
These studies examined choices made in the course of object retrieval when more than one kind of object was available. During a retrieval session, or `trial', a rat could (repeatedly) retrieve either of two types of object drawn from a set of three, when each type of object was located in one arm of a Y-maze connected to the home cage. In Experiment 1 objects varied in degree of partibility, i.e....
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