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    Percept Mot Skills. 1995 Aug;81(1):323-30.

    Visual inspection alone produces a decrement in the horizontal-vertical illusion.

    Source

    Department of Psychology, American University, Washington, DC 20016, USA.

    Abstract

    Subjects inspected either inverted-T or L figures for 5 min. and then shortened the extended vertical lines of inverted-T figures in an attempt to make the vertical line equal in length to the horizontal line. Those who inspected inverted-T figures were more accurate on initial trials than controls (who did not inspect figures), those who inspected L figures, or those who inspected inverted-T figures and made adjustments on the inspected figures. The results indicate that visual inspection alone can produce a decrease in the Horizontal-Vertical illusion and may account, in part, for changes in strategic factors which have been hypothesized to underlie illusion decrement.

    PMID:
    8532475
    [PubMed - indexed for MEDLINE]

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