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RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans
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The problem of serial order in behavior: Lashley's legacy.

David A Rosenbaum1, Rajal G Cohen, Steven A Jax

  • 1Department of Psychology, Pennsylvania State University, University Park, PA 16802, United States. DAR12@PSU.EDU

Human Movement Science
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PubMed
Summary

Behavioral sequences are controlled by hierarchical plans, not reflex chains. These plans are modified in real-time for new movements, and even single actions use hierarchical planning.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Motor Control

Background:

  • Karl Lashley (1951) proposed cognitive, hierarchical central plans for behavior, rejecting reflex chaining.
  • Subsequent research has provided evidence supporting the hierarchical organization of behavioral plans.

Purpose of the Study:

  • To review evidence for hierarchical behavioral plans.
  • To investigate the real-time processes of forming these plans.
  • To explore the hierarchical control of individual movements.

Main Methods:

  • Review of existing evidence on behavioral planning.
  • Analysis of laboratory findings including the parameter remapping effect and handpath priming effect.
  • Examination of the end-state comfort effect and a computational model of motor planning.

Main Results:

  • Behavioral plans are modified from previous sequences rather than created anew.
  • Even single movements are controlled by hierarchical plans, from start/goal postures to intermediate states.
  • A computational model supports hierarchical motor planning, drawing parallels to animation techniques.

Conclusions:

  • Behavioral sequences are governed by hierarchical, cognitive plans.
  • Motor planning involves real-time modification of existing plans and hierarchical control of movements.
  • Computational models offer insights into the mechanisms of hierarchical motor control.