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Research article summary:
Causal capture: contextual effects on the perception of collision events.
Abstract Extract:
In addition to perceiving the colors, shapes, and motions of objects, observers can perceive higher-level properties of visual events. One such property is causation, as when an observer sees one object cause another object to move by colliding with it. ... (Full abstract text below) Published 2002Nov
in Journal: Psychol Sci
(Language : eng)
Full Pubmed Extract
This information was retrieved, real-time, on your behalf from the public area of the Pubmed website:
1. Psychol Sci.
2002 Nov;13(6):493-8
Causal capture: contextual effects on the perception of collision events.
Scholl BJ, Nakayama K
Department of Psychology, Yale University, New Haven, CT 06520-8205, USA. brian.scholl@yale.edu
In addition to perceiving the colors, shapes, and motions of objects, observers can perceive higher-level properties of visual events. One such property is causation, as when an observer sees one object cause another object to move by colliding with it. We report a striking new type of contextual effect on the perception of such collision events. Consider an object (A) that moves toward a stationary object (B) until they are adjacent, at which point A stops and B starts moving along the same path. Such "launches" are perceived in terms beyond these kinematics: As noted in Michotte's classic studies, observers perceive A as being the cause of B's motion. When A and B fully overlap before B's motion, however observers often see this test event as a completely noncausal "pass": One object remains stationary while another passes over it. When a distinct launch event occurs nearby, however, the test event is "captured": It too is now irresistibly seen as causal. For this causal capture to occur, the context event need be present for only 50 ms surrounding the "impact," but capture is destroyed by only 200 ms of temporal asynchrony between the two events. We report a study of such cases, and others, that help define the rules that the visual system uses to construct percepts of seemingly high-level properties like causation.
PMID : 12430831 [PubMed - Indexed for MEDLINE]
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Full Author Information
| First Name | LastName | Initials |
| Brian J | Scholl | BJ |
| Ken | Nakayama | K |
Affiliation: Department of Psychology, Yale University, New Haven, CT 06520-8205, USA. brian.scholl@yale.edu
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