Correlations between the processes of cognitive/perceptual style, spatial localization, arid orientation were analyzed. The correlations were inconclusive suggesting attention can be shifted depending on the presenting task. A group of 18 subjects was randomly divided into three groups. One group was prescribed 36 bases down yoked prisms and one group 26 bases up prisms. There was also a control group receiving no prism prescription. All subjects were administered a test battery to assess cognitive/perceptual style, spatial localization, and orientation both before and after a 1.5 month's adaptation period of prism wear. Vertical yoked prisms were found to significantly alter spatial localization and plus acceptance in the bases down prism subjects and localization in the bases up subjects. These changes were attributed to the principle of reafferance.
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