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Four male Sprague-Dawley rats pressed a lever for food reinforcers delivered by a multiple variable interval 1-min variable interval 1-min schedule. Components alternated every 5 min. The force required to move the lever was 0.25, 0.15, 1.10, 0.75, and 0.50 N in different conditions. Changes in the force requirement did not alter the within-session pattern of responding. These results are consistent...
The aim of this study was to investigate the describability of animals' behaviour in categories of certain statistical procedures after applying the electrical stimulation to the nucleus accumbens. Six rats were trained to run to a burette filled with glucose or water after 0, 10 and 20 of food deprivation. After an animal reached the burette, a train of cathodal rectangular pulses of 100 Hz frequency...
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