Rats' Behavior during an Interfood Clock Is Altered by the Temporal Pattern of Interfood Stimuli

Silva, Kathleen M.; Timberlake, William

doi:10.1006/lmot.1999.1028

Cited by 2 publications

(3 citation statements)

References 39 publications

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“…This result adds to K. M. Silva and Timberlake's (1999) data showing that the pattern of locomotion across clock stimuli can be altered. In that study, rats exposed to a sequence of clock stimuli that became increasingly longer (e.g., 4-8-12-24) showed a peak in locomotion during the second quarter of the IFI, as compared with a relatively flat pattern for rats receiving an increasingly shorter (e.g., 24-12-8-4) clock sequence.…”

Section: Stimulus Control and Behavior Systemssupporting

confidence: 66%

A behavior systems view of the organization of multiple responses during a partially or continuously reinforced interfood clock

Silva

Timberlake

2005

Learning & Behavior

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We examined how a 50% Pavlovian partial reinforcement (PRF) schedule, versus a 100% continuous reinforcement (CRF) schedule, altered the asymptotic amount and distribution of focal and general search behavior in rats during 48-sec trials with and without a four-segment interfood clock (S1-S2-S3-S4-US). Under CRF, but not PRF, average asymptotic focal search (nosing in the feeder) increased across the last two clock segments (S3 and S4), and more for the clock group than the no-clock group. Locomotor general search peaked in the second clock segment (S2) for the CRF-clock and CRF-no-clock groups and in S3 for the PRF-clock groups. Furthermore, the ratio of general search to maximum focal search was higher for the PRF-clock group than for the CRF-clock group. This pattern of results supports the view that predictable reward presentations temporally organize search states and related responses between food presentations. The relative expression of these responses varies with the predictability and proximity of reward and is more sharply defined in the presence of a clock.

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Section: Stimulus Control and Behavior Systemssupporting

confidence: 66%

A behavior systems view of the organization of multiple responses during a partially or continuously reinforced interfood clock

Silva

Timberlake

2005

Learning & Behavior

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“…This modified posi- tion begins with the role of the relative contingency of the stimulus with the final reinforcer and extends that notion to include a gradient extending from a strong positive correlation with food presentation at the end of the interval to a strong negative correlation with food presentation at the beginning of the interval. This view would suggest that the dominant effect obtained in the present study was the acquired inhibitory control over the terminal behavior of a stimulus correlated with a nonreinforced position in the interfood interval, against an excitatory context provided by the randomized clock and temporal stimuli (Barnet & Miller, 1996;Dinsmoor et al, 1986;Palya, 1993;Silva & Timberlake, 1998, 1999.…”

Section: Discussionmentioning

confidence: 70%

“…Palya (1993) reasoned that both Pavlovian and operant procedures could, therefore, be expected to control behavior in a similar fashion, with opposing vectors occurring at opposite ends of a gradient of correlations with the upcoming reinforcer. Stimuli correlated with the maximum likelihood of the reinforcer (S max ) would control terminal behavior, whereas stimuli correlated with the minimum likelihood of the reinforcer (S min ) would control some other behavior, such as escape, inhibition, or an element from a different behavior system (Dinsmoor, 1983;Palya, 1993;Palya & Bevins, 1990;Silva & Timberlake, 1998, 1999. From this perspective, it is possible for all portions of the interval to condition behavior.…”

Section: Discussionmentioning

confidence: 99%

Stimulus control in fixed interfood intervals

Palya

Bowers

2003

Learning & Behavior

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The control exerted by various portions of fixed-time and fixed-interval schedules was assessed with a trace-conditioning procedure. The intervals were segmented into 10 bins. In all but 1 of those bins, the stimuli were presented in different random orders on each trial. In 1 bin, the stimulus was the same on each trial. The position of this trace stimulus was varied across phases. The results indicated that a trace stimulus can come to control behavior and that differential control can extend to even the second tenth of an interfood interval. The results were interpreted as indicating that traditional explanations of the rate loss in earlier portions of an interfood interval are inadequate and that models such as Palya's (1993) bipolar model or Miller and Schachtman's (1985) comparator model may provide a principled framework with which to understand within-trial effects.

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Rats' Behavior during an Interfood Clock Is Altered by the Temporal Pattern of Interfood Stimuli

Cited by 2 publications

References 39 publications

A behavior systems view of the organization of multiple responses during a partially or continuously reinforced interfood clock

A behavior systems view of the organization of multiple responses during a partially or continuously reinforced interfood clock

Stimulus control in fixed interfood intervals

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