Accuracy and precision of binocular 3-D motion perception

Julie Harris, PJA Dean

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

In principle, information for 3-D motion perception is provided by the differences in position and motion between left- and right-eye images of the world. It is known that observers can precisely judge between different 3-D motion trajectories, but the accuracy of binocular 3-D motion perception has not been studied. The authors measured the accuracy of 3-D motion perception. In 4 different tasks, observers were inaccurate, overestimating trajectory angle, despite consistently choosing similar angles (high precision). Errors did not vary consistently with target distance, as would be expected had inaccuracy been due to misestimates of viewing distance. Observers appeared to rely strongly on the lateral position of the target, almost to the exclusion of the use of depth information. For the present tasks, these data suggest that neither an accurate estimate of 3-D motion direction nor one of passing distance can be obtained using only binocular cues to motion in depth.

Original languageEnglish
Pages (from-to)869-881
Number of pages13
JournalJournal of Experimental Psychology: Human Perception and Performance
Volume29
Issue number5
DOIs
Publication statusPublished - Oct 2003

Keywords

  • IN-DEPTH
  • 3-DIMENSIONAL MOTION
  • STEREOSCOPIC ACUITY
  • VISUAL SPACE
  • STEREOMOTION
  • INFORMATION
  • DISTANCE
  • MOVEMENT
  • DISCRIMINATION
  • MECHANISMS

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