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Response-shock delay as a reinforcer in avoidance behavior.

Journal of the Experimental Analysis of Behavior

|November 1, 1975

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Rats adjusted lever-retraction responses based on shock delay. Consistent responding occurred when lever presses delayed shock, with latency matching the delay duration. When responses didn't delay shock, rats showed shock-elicited or preshock behaviors.

Area of Science:

Behavioral neuroscience
Animal behavior studies
Operant conditioning

Background:

Rats were trained on a discrete-trial avoidance task.
The task was modified so lever responses only delayed shock onset, not preventing it.

Purpose of the Study:

To investigate how rats adjust their lever-pressing behavior when responses only delay, rather than prevent, shock.
To examine the relationship between response latency and shock delay in rats.

Main Methods:

Rats underwent preliminary training on a shock-avoidance procedure.
The procedure was altered to a shock-delay paradigm where lever responses delayed shock.
Response latencies and shock delays were systematically manipulated.

Main Results:

Related Experiment Videos

Approximately 50% of rats exhibited consistent lever pressing.
Response latency adapted to maximize the shock delay, with shorter latencies for shorter delays and longer latencies for longer delays.
When response latency did not influence shock delay, rats displayed either shock-elicited or preshock responding.

Conclusions:

Rat lever-pressing behavior is sensitive to the temporal consequences of their actions.
Response-shock delay is a critical factor influencing response rate and latency in avoidance learning.
Behavioral adaptation in rats reflects a strategy to optimize shock postponement.