Learn More
Choice responding in adult humans on a discrete-trial button-pressing task was examined as a function of amount, delay, and overall density (points per unit time) of reinforcement. Reinforcement consisted of points that were exchangeable for money. In T 0 conditions, an impulsive response produced 4 points immediately and a self-control response produced 10(More)
It has been recognized for a considerable period of time that one of the critical experimental variables in determining response strength in instrumental reward conditioning is magnitude of the reward object (WK). Several investigators (Crespi, 1942; Czeh, 1954; Zeaman, 1949) have found that, within limits, response strength increases as magnitude of the(More)
The present study was designed to investigate the differential effects of environmental factors on performance in young and aged rats. Specifically, within- and between-session habituation, environmental preexposure, and noise conditions were examined. Consistent age differences were found in response to environmental change and sensory condition.(More)