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Object-array structure, frames of reference, and retrieval of spatial knowledge

R D Easton1, M J Sholl

  • 1Department of Psychology, Boston College, Chestnut Hill, Massachusetts 02167, USA.

Journal of Experimental Psychology. Learning, Memory, and Cognition
|March 1, 1995
PubMed
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People without vision can locate objects using imagined movements. Spatial memory retrieval depends on array structure, using direct access for translation in regular arrays and body-centered systems for rotation and irregular arrays.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Spatial Cognition

Background:

  • Understanding spatial memory and navigation in individuals without vision is crucial for developing assistive technologies.
  • Investigating the cognitive mechanisms underlying spatial representation and retrieval is key to understanding human perception.

Purpose of the Study:

  • To examine how people without vision mentally represent and retrieve object locations from novel viewpoints.
  • To determine if spatial information is accessed directly or through a body-centered coordinate system.
  • To explore the role of imagined self-motion (translation and rotation) in spatial memory recall.

Main Methods:

  • Participants without vision performed object localization tasks from imagined viewpoints.
  • The study manipulated the structure of object arrays (regular vs. irregular) and the type of spatial transformation (translation vs. rotation).

Related Experiment Videos

  • Performance was analyzed to infer the underlying spatial retrieval strategies.

    • Main Results:

    • For regularly structured object arrays, interobject spatial relations were directly retrieved for translation tasks.
    • For rotation tasks and irregularly structured arrays, spatial retrieval relied on a body-centered coordinate system, necessitating imagined body rotation or translation.
    • The regularity of the object array influenced the retrieval of global shape and local object positions.

    Conclusions:

    • Spatial memory retrieval strategies differ based on array structure and movement type.
    • A body-centered coordinate system, involving imagined self-motion, is essential for complex spatial transformations and irregular spatial layouts.
    • Findings highlight the flexibility and adaptability of spatial cognition in individuals without vision.