Structure of higher visuoperceptual function, Data analysis of Visual Perception Test for Agnosia

Abstract

    We analysed the associations among symptoms of visual agnosia and visuospatial agnosia using standardization data of Visual Perception Test for Agnosia (VPTA). Two main factors were extracted by cluster analysis of symptoms and factor analysis of test scores. One factor is object, picture, color, and symbol recognition, and the other factor is figure and face recognition. Distribution of visual and visuospatial agnosias was concluded by combination of these two factors. That is severity sequence of visual agnosias and independence of unilateral spatial agnosia and prosopagnosia from the sequence.