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  • Title: The left visual hemispace bias for the perception of chimeric faces: a further test of the difficulty of discrimination hypothesis.
    Author: Carbary TJ, Almerigi JB, Harris LJ.
    Journal: Brain Cogn; 2001; 46(1-2):57-62. PubMed ID: 11527364.
    Abstract:
    When people make judgments of visual-spatial forms, they generally perform better if the information is presented in their left visual hemispace (LVH), whereas for verbal material, they generally show a right visual hemispace (RVH) bias. For verbal material, the strength and direction of the effect also has been linked to task difficulty, with the bias shifting toward the RVH as task difficulty increases. Two experiments are presented that show the reverse direction of change for a nonverbal task; that is, when a nonverbal task is more difficult, the usual LVH effect shifts toward an RVH bias. Taking into account recent developments in theory and research on hemispheric differences in styles of information processing, we propose that task difficulty is related more generally to changes in processing style.
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