THE SPIRAL AFTEREFFECT: INFLUENCE OF STIMULUS SIZE AND VIEWING DISTANCE ON THE DURATION OF ILLUSORY MOTION,

Abstract

The study examined some effects of stimulus size and distance on the persistence of one type of illusory motion, viz., the spiral aftereffect (SAE). Duration of SAE was investigated with stimuli of 2, 4, 8, 12, and 16 inches in diameter. The distance between the observers and the rotating spirals was varied to produce visual angles between 1 deg. 12 min. and 18 deg. 56 min. of arc. Data indicate that the duration of illusory motion reaches peak values between approximately 2 deg. -4 deg. of visual angle. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1968
Accession Number
AD0673664

Entities

People

  • David J. Schroeder
  • William E. Collins

Organizations

  • Civil Aeromedical Institute

Tags

DTIC Thesaurus Topics

  • Diameters
  • Geometry
  • Mathematics
  • Observers
  • Peak Values
  • Physical Properties

Fields of Study

  • Psychology

Readers

  • Unmanned Aerial System (UAS) Autonomous Capabilities and Mission Reconnaissance.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.