title: Parafoveal identification asymmetry in a lateral masking effect.
abstract: The degree to which the identification of a parafoveally presented letter target was impaired by being flanked by a foveal or peripheral nontarget at a target-mask interval of zero, 75, or 150 msec, was examined. Peripheral placement of the nontarget was more disruptive than foveal placement, and this asymmetry was significantly more pronounced at a 75-msec interval than at either of the other two. This finding is consonant with explanations of the asymmetry based on target visibility rather than on criterion or response factors.
mesh_terms: D001288:Attention; D004193:Discrimination Learning; D005556:Form Perception; D006801:Humans; D010364:Pattern Recognition, Visual; D010470:Perceptual Masking; D014794:Visual Fields