A Principal Components Analysis of Dynamic Spatial Memory Biases

Michael A. Motes, Timothy L. Hubbard, Jon R. Courtney, Bart Rypma

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Research has shown that spatial memory for moving targets is often biased in the direction of implied momentum and implied gravity, suggesting that representations of the subjective experiences of these physical principles contribute to such biases. The present study examined the association between these spatial memory biases. Observers viewed targets that moved horizontally from left to right before disappearing or viewed briefly shown stationary targets. After a target disappeared, observers indicated the vanishing position of the target. Principal components analysis revealed that biases along the horizontal axis of motion loaded on separate components from biases along the vertical axis orthogonal to motion. The findings support the hypothesis that implied momentum and implied gravity biases have unique influences on spatial memory.

Original languageEnglish (US)
Pages (from-to)1076-1083
Number of pages8
JournalJournal of Experimental Psychology: Learning Memory and Cognition
Issue number5
StatePublished - Sep 2008


  • internalized physical principles
  • memory biases
  • representational gravity
  • representational momentum
  • spatial memory

ASJC Scopus subject areas

  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language


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