title: The role of high spatial frequencies in hemispheric processing of categorical and coordinate spatial relations.
abstract: Right-handed participants performed categorical and coordinate spatial relation tasks on stimuli presented either to the left visual field-right hemisphere (LVF-RH) or to the right visual field-left hemisphere (RVF-LH). The stimuli were either unfiltered or low-pass filtered (i.e., devoid of high spatial frequency content). Consistent with previous studies, the unfiltered condition produced a significant RVF-LH advantage for the categorical task and an LVF-RH advantage for the coordinate task. Low-pass filtering eliminated this Task x Visual Field interaction; thus, the RVF-LH advantage disappeared for the categorical task. The present results suggest that processing of high spatial frequency contributes to the left hemispheric advantage for categorical spatial processing.
authors.affiliation: Sophia University. mokobo@unimelb.edu.au
authors.forename: Matia
authors.initials: M
authors.lastname: Okubo
authors.forename: Chikashi
authors.initials: C
authors.lastname: Michimata
mesh_terms: D000328:Adult; D002965:Classification; D004192:Discrimination, Psychological / Q000502:physiology*; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology; D012016:Reference Values; D013028:Space Perception / Q000502:physiology*; D013037:Spatial Behavior / Q000502:physiology; D014794:Visual Fields / Q000502:physiology*