Within-Session Patterns of Pigeons' General Activity

Weatherly, Jeffrey N.; McSweeney, Frances K.; Swindell, Samantha

doi:10.1006/lmot.1998.1017

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…Finding such changes do not rule out the possibility of a floor , effect, but they do indicate that response rates were sufficiently large for a change to be detected. The present results appear to support the contention of Weatherly et al (1998) that the response-reinforcer relation can influence the within-session pattern of responding. These researchers found that systematic within-session changes in pigeons' general activity were only observed when activity was the operant response.…”

Section: Discussionsupporting

confidence: 88%

“…Weatherly, McSweeney, and Swindell (1998) studied the within-session patterns of pigeons' general activity during 60-min sessions when the pigeons pecked a key on a simple variable-interval (VI) schedule (Experiment 1), received food delivered by a simple variable-time schedule (Experiment 2), or were reinforced for activity on a simple VI' schedule (Experiment 3). In all experiments, programmed rates of reinforcement varied from 15 to 240 reinforcers per hr across conditions.…”

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confidence: 99%

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Effect of Unsignaled Delay to Reinforcement on Within-Session Responding

et al. 2000

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The present study determined if altering the unsignaled delay to reinforcement would alter the within-session pattern of responding. In both Experiments 1 and 2, 4 rats pressed a lever for reinforcers delivered by a variable-interval schedule during 50-min sessions. Across conditions, the value of the variable-interval schedule' was either 15 or 60 s and the unsignaled delay to reinforcement was 0.04, 0.20, 1.00, 5.00, or 25.00 s. Food-pellet reinforcers were delivered in Experiment 1 and 5% liquid-sucrose reinforcers were delivered in Experiment 2. Increasing the delay to reinforcement altered both response rates and response patterns, except when sucrose reinforcers were delivered by a variable interval 60-s schedule. These results may pose problems for some theories of delayed reinforcement. Perhaps more importantly, they indicate that procedural aspects can potentially influence conclusions made about the effect of delayed reinforcement. ,

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Section: Discussionsupporting

confidence: 88%

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Effect of Unsignaled Delay to Reinforcement on Within-Session Responding

et al. 2000

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Habituation of responding for food in humans

Ernst

Epstein

2002

Appetite

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Within-Session Rates of Responding When Reinforcer Magnitude Is Changed Within the Session

Weatherly

McSweeney

Swindell

2004

The Journal of General Psychology

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In the present experiment, the authors investigated the idea that within-session changes in operant response rates occur because subjects sensitize and then habituate to the reinforcer. If that is true, then altering an aspect of the reinforcer within the session should alter the observed within-session responding. The authors tested that idea by having rats press a lever for 2 food-pellet reinforcers delivered by a variable-interval 120-s schedule during 60-min baseline sessions. In treatment conditions, the magnitude of the reinforcer was halved (1 pellet) or doubled (4 pellets) 10, 20, 30, 40, or 50 min into the session. That magnitude of reinforcement then remained in effect for the rest of the session. Altering reinforcer magnitude altered the rates of responding within the session in a fashion consistent with the habituation explanation, that is, response rates increased, relative to baseline, when the magnitude of reinforcement was increased. They decreased when the magnitude was decreased. Those results were seemingly inconsistent with the competing idea that within-session decreases in responding rates are produced by satiation.

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Within-Session Patterns of Pigeons' General Activity

Cited by 4 publications

References 16 publications

Effect of Unsignaled Delay to Reinforcement on Within-Session Responding

Effect of Unsignaled Delay to Reinforcement on Within-Session Responding

Habituation of responding for food in humans

Within-Session Rates of Responding When Reinforcer Magnitude Is Changed Within the Session

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