Word matching and Lexical Decisions: A Visual Half-Field study |
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Authors: | Nico Brand Iet van Bekkum Mieke Stumpel Jan H A Kroeze |
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Institution: | Rijks Universiteit Utrecht The Netherlands |
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Abstract: | In unilateral Visual Half-Field tasks visuospatial and linguistic processing were compared. In a Word Matching task subjects judged the physical identity of simultaneously presented pairs of three-letter words or legal nonwords. No mainfield effects were found, but word pairs were recognized better and faster as "same" than nonword pairs. Latencies and errors in "different" pairs increased monotonically with position of letter change in the left but not in the right visual field (RVF), suggesting a serial, letter-by-letter way of processing for the right hemisphere and a whole word approach for the left. At this perceptual level the ability to store lexical information from the icon is stressed as a hemisphere-specific factor. In a Lexical Decision task the same subjects judged the same items on the word/nonword dimension. A RVF advantage associated with words as compared to nonwords occurred, as expected. Additional analysis suggests that order and difficulty of tasks may influence females' laterality, as compared to that of males. |
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Keywords: | Send requests for reprints to Dr A N Brand Psychiatrische Universiteitskliniek Nicolaas Beetsstraat 24 3511 HG Utrecht The Netherlands |
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