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Related Experiment Videos

Grasping a fruit: selection for action

U Castiello1

  • 1Dipartimento di Psicologia, Università di Bologna, Italy.

Journal of Experimental Psychology. Human Perception and Performance
|June 1, 1996
PubMed
Summary
This summary is machine-generated.

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Unconscious information processing was studied using reach-to-grasp movements. Distractor fruits did not affect movement kinematics unless a secondary task involved the distractor, suggesting limited passive processing.

Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Motor control

Background:

  • Investigating unconscious information processing is crucial for understanding cognitive mechanisms.
  • Reach-to-grasp movements provide a naturalistic task to study action selection.
  • The role of distractors in motor tasks remains an area of active research.

Purpose of the Study:

  • To examine unconscious information processing during reach-to-grasp movements.
  • To determine the influence of distractor stimuli on the kinematics of object manipulation.
  • To differentiate between automatic and controlled processing of task-irrelevant information.

Main Methods:

  • Kinematic analysis of upper limb reach-to-grasp movements using the ELITE system.
  • Nine experiments involving various fruits as targets and distractors.

Related Experiment Videos

  • Manipulation of task demands, including subsidiary tasks involving distractors.

    • Main Results:

    • Distinct kinematics were observed for grasping different types of fruit.
    • Distractor fruits did not alter movement kinematics when no subsidiary task was present.
    • Interference effects emerged when participants performed a counting task on illuminated distractor fruits.
    • No interference was observed when grasping a target fruit and counting its illuminations simultaneously.

    Conclusions:

    • Action selection appears to involve minimal passive processing of distractors.
    • Dual-action processing of simultaneous objects can lead to automatic processing of irrelevant distractor properties.
    • These findings contribute to understanding the limits and mechanisms of attentional control in motor tasks.