title: Contrast sensitivity at low spatial frequencies in the hooded rat.
abstract: Behavioural methods were used to measure spatial contrast sensitivity, to vertical sine-wave luminance profile gratings, in hooded rats. Low frequency attenuation of sensitivity was observed at spatial frequencies below 0.1c/deg. This attenuation exceeded that produced by varying the number of periods in the grating, indicating that it was a function of spatial frequency as well as number of periods.
mesh_terms: D000818:Animals; D003216:Conditioning, Operant; D004192:Discrimination, Psychological; D005556:Form Perception; D008297:Male; D010364:Pattern Recognition, Visual; D051381:Rats