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Timing, remembering, and discrimination.

Rebecca J Sargisson1, K Geoffrey White

  • 1Department of Psychology, University of Otago, Dunedin, New Zealand. rebeccas@psy.otago.ac.nz

Journal of the Experimental Analysis of Behavior
|March 10, 2007
PubMed
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Pigeons learned to discriminate between short and long delays, but required extensive training to generalize this timing ability when also remembering visual cues. This suggests complex temporal discrimination develops gradually.

Area of Science:

  • Cognitive Psychology
  • Animal Behavior
  • Behavioral Neuroscience

Background:

  • Temporal discrimination is crucial for many behaviors.
  • Understanding how animals process time and associate it with other stimuli is key to understanding cognitive mechanisms.
  • Previous research has explored timing in pigeons, but less is known about combined temporal and visual discrimination.

Purpose of the Study:

  • To investigate pigeons' ability to discriminate between short and long delay intervals.
  • To examine how pigeons combine temporal interval discrimination with sample stimulus (visual cue) discrimination.
  • To assess the generalization of timing abilities across different delay intervals in a combined discrimination task.

Main Methods:

  • Four pigeons were trained on a timing procedure involving sample stimuli (X or square) followed by variable delay intervals.

Related Experiment Videos

  • Reinforcement depended on the duration of the delay (short vs. long) and the side key pecked (red or green).
  • Choice responses were tested across multiple time intervals, and generalization gradients were analyzed.

    • Main Results:

    • Pigeons showed systematic choice variations across delay intervals in simple timing conditions.
    • In the combined remembering condition, accurate choice at trained delays did not initially generalize to intermediate delays.
    • Prolonged training in the remembering task led to response patterns resembling those in the timing-only conditions, with asymmetrical generalization gradients consistent with Weber's Law.

    Conclusions:

    • Pigeons can learn complex temporal discriminations, but integrating temporal information with other sensory cues requires significant training.
    • The generalization of temporal control is influenced by the complexity of the discrimination task.
    • Findings support Weber's Law in temporal generalization, indicating that relative accuracy of time perception is maintained across different delay durations.