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Psychological Science 21(7) 10001005

Summary: Psychological Science
21(7) 10001005
The Author(s) 2010
Reprints and permission:
DOI: 10.1177/0956797610371962
Fifty years ago, in a brief report, Gregory, Wallace, and Camp-
bell (1959) described qualitative changes to visual afterimages
in response to bodily movements. In a bulleted point in the
text, the authors noted:
If the flash tube is directed on to the subject's hand, so
that an after-image of the hand is produced, some curi-
ous phenomena may be observed . . . . The visual and
proprioceptive loci of the hand may separate in a dis-
concerting manner. Further complex effects occur if the
subject attempts to pick up an object. . . . (p. 297)
Gregory and his colleagues offered little speculation on these
intriguing findings, and, to date, few studies have followed up
on their remarkable observations. One notable study by Davies


Source: Alvarez, George A. - Department of Psychology, Harvard University


Collections: Biology and Medicine