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Milo, Jessie-Sue; Mace, F. Charles; Nevin, John A. – Journal of the Experimental Analysis of Behavior, 2010
Previous research has demonstrated that factors such as reinforcer frequency, amount, and delay have similar effects on resistance to change and preference. In the present study, 4 boys with autism made choices between a constant reinforcer (one that was the same food item every trial) and a varied food reinforcer (one that varied randomly between…
Descriptors: Resistance to Change, Reinforcement, Males, Autism
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Odum, Amy L.; Ward, Ryan D. – Journal of the Experimental Analysis of Behavior, 2004
Recent experiments suggest that the effects of drugs of abuse on the discrimination of the passage of time may differ for experimenter-imposed and subject-produced events. The current experiment examined this suggestion by determining the effects of morphine on the discrimination of interresponse times (IRTs). Pigeons pecked a center key on a…
Descriptors: Responses, Drug Abuse, Intervals, Animals