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Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

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Entropy as a Window Into Behavioral Phase Transitions: Unveiling Contextual Dynamics in Affordance-Based Reaching.

Dalton S Cooper¹, Tarcisio S Moreira¹, Tehran J Davis¹

¹Department of Psychology, Center for Cognition, Action, and Perception, University of Cincinnati, Cincinnati, OH, USA.

|June 28, 2024

Summary

Behavioral transitions show hysteresis, influenced by aperture size changes and goal location. Entropy analysis reveals distinct patterns based on aperture size adjustments, offering insights into dynamical systems.

Keywords:

action decisions behavioral dynamics behavioral transitions ecological psychology motion analysis

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Area of Science:

Cognitive Science
Dynamical Systems Theory
Motor Control

Background:

Hysteresis effects are documented in affordance-guided behavior control.
Previous research has not fully explored the impact of global context on these hysteresis phenomena.

Purpose of the Study:

To investigate the influence of global context on hysteresis in affordance-guided behavior.
To examine how changes in aperture size and goal location affect behavioral transitions.
To analyze reach trajectory entropy for insights into behavioral phase transitions.

Main Methods:

An affordance-based reaching task was designed.
Participants moved a target through variable or constant size apertures.
Entropy of reach trajectories was measured and analyzed.

Main Results:

The direction of change in variable aperture size significantly impacted behavioral transition points.
This effect demonstrated an interaction with the goal's location.
Entropy structure differed based on the direction of aperture size change.

Conclusions:

Global context, specifically goal location, modulates hysteresis in affordance-guided behavior.
Dynamical systems principles can explain observed behavioral phase transitions.
Further research should explore these contextual influences and entropy dynamics.