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The Power of Interstimulus Interval for the Assessment of Temporal Processing in Rodents
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Stimulus control in multiple temporal discriminations.

Marcelo S Caetano1, Paulo Guilhardi, Russell M Church

  • 1Department of Psychology, Brown University, Providence, RI, USA. marceloscaetano@gmail.com

Learning & Behavior
|March 27, 2012
PubMed
Summary
This summary is machine-generated.

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Training rats with stimuli signaling different fixed intervals (FI) shows that intermixed training, not blocked training, allows stimuli to control behavior. Temporal cues can overshadow stimulus control in blocked FI schedules.

Area of Science:

  • Behavioral neuroscience
  • Animal behavior

Background:

  • In operant conditioning, stimuli often signal upcoming events, influencing behavior.
  • Fixed interval (FI) schedules involve responding after a set amount of time has passed.
  • Stimuli signaling different FIs can acquire control over response timing.

Purpose of the Study:

  • To investigate how the training procedure (intermixed vs. blocked) affects stimulus control in multiple fixed interval (FI) schedules.
  • To determine if temporal cues can overshadow stimulus control in FI schedules.

Main Methods:

  • Rats were trained on multiple FI schedules using two procedures: stimuli and FIs intermixed within sessions, or FIs presented in blocks per session.
  • Performance was assessed by observing response timing in relation to stimulus onset and FI duration.

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Related Experiment Videos

Last Updated: May 23, 2026

The Power of Interstimulus Interval for the Assessment of Temporal Processing in Rodents
10:27

The Power of Interstimulus Interval for the Assessment of Temporal Processing in Rodents

Published on: April 19, 2019

A Two-interval Forced-choice Task for Multisensory Comparisons
07:13

A Two-interval Forced-choice Task for Multisensory Comparisons

Published on: November 9, 2018

An Operant Intra-/Extra-dimensional Set-shift Task for Mice
08:35

An Operant Intra-/Extra-dimensional Set-shift Task for Mice

Published on: January 22, 2016

Main Results:

  • While overall asymptotic performance was similar across procedures, stimuli acquired control over responding only when trained in an intermixed schedule.
  • In the blocked schedule, rats' performance was primarily influenced by the temporal aspects of the task, not the presented stimulus, indicating overshadowing.

Conclusions:

  • The method of training significantly impacts whether discriminative stimuli acquire control over behavior in multiple FI schedules.
  • Temporal cues can overshadow stimulus control, particularly when intervals are presented in blocks, suggesting that stimulus-discriminability is crucial for effective signaling.