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ERIC Number: EJ877095
Record Type: Journal
Publication Date: 2010-Feb
Pages: 15
Abstractor: As Provided
Reference Count: 34
ISSN: ISSN-0096-1523
Object Trimming: When Masking Dots Alter Rather than Replace Target Representations
Kahan, Todd A.; Enns, James T.
Journal of Experimental Psychology: Human Perception and Performance, v36 n1 p88-102 Feb 2010
Five experiments demonstrate that when dots appear beside a briefly presented target object, and persist on view longer than the target, the flanked object is perceptually altered by the dots. Three methods are used to explore this "object trimming effect". Experiments 1-3 assess participants' conscious reports of trimmed digits, Experiment 4 uses repetition priming to explore the target representation, and Experiment 5 examines the perception of apparent motion in trimmed targets. Results of all three methods indicate that object trimming is influenced by mechanisms of perceptual grouping that operate on target representations prior to conscious access. Separate contributions from visual crowding and backward masking are also identified. These results imply that common-onset masking does not always result from the target being substituted by the mask, but that target and mask can sometimes maintain separate mental representations. (Contains 4 footnotes, 7 tables, and 10 figures.)
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A