title: Hemispheric asymmetries in the identification of band-pass filtered letters.
abstract: Processing of band-pass filtered letters in the left versus right cerebral hemispheres (LH vs. RH) was examined. The present experiments constituted a partial replication of a study in which Peterzell, Harvey, and Hardyck (1989) found no hemispheric differences in accuracy or reaction time (RT) as a function of spatial frequency. However, methodological limitations of their study (e.g., the possibility that subjects were engaged in a detection, not identification, task) may have obscured possible hemispheric differences. We addressed these problems in the present study, obtaining significant hemisphere × spatial frequency interactions for RT andd', with RH advantages at low frequencies and LH advantages at high frequencies; however, these effects were not large in magnitude and were often restricted to particular dependent variables, stimulus sizes, and so forth. Hemispheric differences in response bias were also found.
authors.affiliation: Department of Psychology, University of Toledo, 43606, Toledo, OH, schrist2@uoft02.utoledo.edu.
authors.forename: S D
authors.initials: SD
authors.lastname: Christman
authors.forename: F L
authors.initials: FL
authors.lastname: Kitterle
authors.forename: C L
authors.initials: CL
authors.lastname: Niebauer