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The present study with rats replicated an experiment on the ability of zebra finches and humans to discriminate among brief auditory stimuli (see Weisman et al., 1999, Experiment 2). We trained rats with 27 3-kHz tones that varied in duration from 10ms to 1420ms. Reinforcement was contingent on responding (approaching the food well) to the nine medium-durations range tones (56–255ms) but not to the...
In an enclosed four-arm radial maze, after sampling three experimenter-selected baited arms (thestudy segment) and following rotation of the maze, rats had to find the fourth baited arm among all four unblocked arms (test segment). The rats learned this task with two sets of arm cues, objects at arms’ entrances and full arm inserts, each maintained in a fixed configuration. When we changed the configuration...
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