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A cumulative decision model for three-alternative choice in concurrent chains.

Randolph C Grace1, Anthony P McLean1

  • 1Department of Psychology, University of Canterbury.

Journal of Experimental Psychology. Animal Learning and Cognition
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Summary
This summary is machine-generated.

The cumulative decision model (CDM) accurately explains choice behavior in three-alternative concurrent-chains procedures, outperforming traditional models. This suggests generalizable principles for choice across different scenarios.

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Area of Science:

  • Behavioral psychology
  • Animal cognition
  • Decision-making models

Background:

  • Traditional choice models in concurrent-chains procedures rely on conditioned reinforcement.
  • The cumulative decision model (CDM) posits choice is based on delay comparisons, not conditioned reinforcement.
  • The hyperbolic value-added model (HVA) explains choice via conditioned reinforcement value.

Purpose of the Study:

  • To test the cumulative decision model's (CDM) ability to explain choice in three-alternative concurrent-chains (3ACC).
  • To compare the predictive accuracy of CDM against the hyperbolic value-added model (HVA) in 3ACC.
  • To investigate the generalizability of choice principles from binary to three-alternative concurrent-chains.

Main Methods:

  • Experiment 1: Pigeons (n=4) responded in 3ACC with fixed-interval terminal links; CDM and HVA parameters predicted variable-interval outcomes.
  • Experiment 2: Pigeons (n=7) responded in 3ACC with fixed-interval terminal links; model residuals were analyzed.
  • Residual meta-analysis of prior 3ACC studies was conducted to compare HVA and CDM systematic deviations.

Main Results:

  • CDM predictions were more accurate than HVA predictions in Experiment 1.
  • HVA fits in Experiment 2 and the meta-analysis showed a systematic pattern (negative cubic polynomial), predicted by CDM.
  • CDM residuals showed no systematic pattern, indicating a better fit to the 3ACC data.

Conclusions:

  • The cumulative decision model (CDM) provides a superior account of choice behavior in three-alternative concurrent-chains procedures.
  • Results support the CDM's mechanism of comparing delays to a criterion, rather than conditioned reinforcement value.
  • The principles governing binary choice in concurrent chains generalize effectively to three-alternative choice without modification.