Word learning is 'smart': evidence that conceptual information affects preschoolers' extension of novel words.

Full Abstract

We examined electrophysiological correlates of conscious change detection versus change blindness for equivalent displays. Observers had to detect any changes, across a visual interruption, between a pair of successive displays. Each display comprised grey circles on a background of alternate black and white stripes. Foreground changes arose when light-grey circles turned dark-grey and vice-versa. Physically stronger background changes arose when all black stripes turned white and vice-versa. Despite their physical strength, background changes were undetected unless attention was directed to them, whereas foreground changes were invariably seen. Event-related potentials revealed that the P300 component was suppressed for unseen background changes, as compared with the same changes when seen. This effect arose first over frontal sites, and then spread to parietal sites. These results extend recent fMRI findings that fronto-parietal activation is associated with conscious visual change detection, to reveal the timing of these neural correlates.

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Author information

Author/s: Booth, Amy E (AE); Waxman, Sandra R (SR);

Affiliation: Department of Psychology, Northwestern University, 2029 Sheridan Road, Evanston, IL 60208-2710, USA. a-booth@northwestern.edu

Grants: HD-08595-02 (Agency:United States NICHD) ; HD-28730 (Agency:United States NICHD)

Journal and publication information

Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, U.S. Gov't, P.H.S.

Journal: Cognition (Cognition), published in Netherlands. (Language: eng)

Reference: 2002-May; vol 84 (issue 1) : pp B11-22

Dates: Created 2002/06/13; Completed 2002/07/16; Revised 2007/11/14;

PMID: 12062150, status: MEDLINE (last retrieval date: 11/6/2008)

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

Comments and Corrections

CommentIn: Cognition. 2003 Apr;87(3):209-13. (PMID: 12684200)

CommentIn: Cognition. 2003 Apr;87(3):215-8. (PMID: 12684201)

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