Visuospatial Stimuli Research Articles

Upright and inverted faces, and housefronts, in the two visual fields: A right and a Left hemisphere contribution

Abstract In the first experiment, schematic outline drawings of upright and inverted faces and house fronts, where nontargets differed from targets by all three features, were flashed to left and right visual fields (LVF and RVF, respectively), in a discriminatory manual RT task. An equally strong LVF superiority occurred for each type of stimulus. There was no evidence in this task of a specialist processor for upright faces in the right hemisphere over and above the latter's general mediation of complex visuospatial stimuli. The second experiment confirmed that a right hemisphere superiority is not an inevitable concommitant of processing face material. Upright faces which previously had been shown to generate a RVF superiority in the context of difficult, analytic, single-feature discriminations, and a LVF superiority in the context of an easy holistic match-mismatch, were combined into a single sequence to determine whether the perceived nature of the total task would change the magnitude or direction...

Lateral asymmetries in the recognition of words, familiar faces and unfamiliar faces

Words, familiar faces and unfamiliar faces were tachistoscopically presented in lateral view to normal right-handed adult subjects. A RVF advantage was obtained for word recognition and a LVF advantage was obtained for the recognition of both familiar and unfamiliar faces. Moreover, the LVF advantage for familiar faces was obtained when the required response was recognition from an array as well as when it was naming. This pattern of results is consistent with results of recent studies that indicate right-hemisphere involvement in the recognition of complex visuo-spatial stimuli, whether or not these stimuli have verbal labels.