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Task constraints on affordance boundaries.

Stacy M Lopresti-Goodman1, Michael J Richardson, Reuben M Baron

  • 1Center for the Ecological Study of Perception and Action (CESPA) and the Dept. of Psychology, University of Connecticut, Storrs, CT 06269, USA.

Motor Control
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Summary
This summary is machine-generated.

This study on affordance tasks found that hysteresis in plank grasping depends on presentation speed and cognitive load. Reducing cognitive load may improve task performance and reduce hysteresis effects.

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Area of Science:

  • Cognitive Psychology
  • Motor Control
  • Human-Computer Interaction

Background:

  • Perceived affordances guide action selection, but their dynamic properties are not fully understood.
  • Hysteresis, a phenomenon where past states influence current decisions, has been observed in perception-action tasks.
  • The role of cognitive resources in modulating affordance-based behaviors requires further investigation.

Purpose of the Study:

  • To investigate the influence of task-relevant (presentation speed, plank sequence) and task-irrelevant (cognitive load) factors on affordance task actualization.
  • To determine if hysteresis effects in a simple grasping task are modulated by presentation speed and cognitive load.
  • To explore the cognitive resource demands associated with behavioral responses to perceived affordances.

Main Methods:

  • Participants performed a simple affordance task involving grasping and moving wooden planks of varying sizes.
  • Task-relevant manipulations included different plank presentation speeds (fast, self-paced, slow) and plank sequences (ascending/descending).
  • Task-irrelevant manipulation involved imposing a cognitive load (backward counting) during the task.

Main Results:

  • Hysteresis was observed at faster presentation speeds, with transition points differing between ascending and descending plank series.
  • The slowest presentation speed (10 s/plank) eliminated hysteresis.
  • Cognitive load exaggerated hysteresis at both fast and slow presentation speeds.

Conclusions:

  • Behavioral responses to the attractor dynamics of perceived affordances are cognitive processes that require minimal resources.
  • Hysteresis in affordance tasks is sensitive to both the temporal dynamics of stimulus presentation and concurrent cognitive demands.
  • Understanding these dynamics is crucial for designing effective human-computer interaction and optimizing motor control strategies.