When the target becomes the mask: using apparent motion to isolate the object-level component of object substitution masking.

Full Abstract

J. T. Enns and V. Di Lollo (1997) discovered a new form of visual masking that they labeled object substitution masking (OSM). OSM occurs when 4 dots, presented around a target, trail in the display after target offset. The present study showed that the physical presence of the masking dots after target offset is not necessary for OSM. Instead, the continued presence of a changing high-level representation associated with the target suffices to yield OSM. Apparent motion was used to define such representation. In these experiments, the initial display offset and was followed by a 2nd display where masks appeared at new locations. Only when the spatiotemporal properties of the stimuli on the 2nd display supported the perception of the target moving and turning into the mask was OSM observed.

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Author information

Author/s: Lleras, Alejandro (A); Moore, Cathleen M (CM);

Affiliation: Department of Psychology, Pennsylvania State University, USA. alleras(-atsign-)psych.ubc.ca

Journal and publication information

Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial

Journal: Journal of experimental psychology. Human perception and performance (J Exp Psychol Hum Percept Perform), published in United States. (Language: eng)

Reference: 2003-Feb; vol 29 (issue 1) : pp 106-20

Dates: Created 2003/04/02; Completed 2003/06/11; Revised 2004/11/17;

PMID: 12669751, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Analysis of Variance
Attention - physiology
Humans
Models, Psychological
Motion Perception - physiology

Perceptual Masking - physiology
Psychophysics
Space Perception - physiology
Time Factors
Visual Perception - physiology

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