Effects of intertrial interval, orientation, and adaptation on orientation discrimination measured with a yes-no signal detection paradigm.
Orientation discriminations were measured with a 3.8-cpd sinusoidal grating stimulus and a yes-no signal-detection procedure. Analysis showed that such discriminations are independent of light-adaptation conditions and of intertrial interval over the 2- to 8-sec. range of values explored. However, they are strongly influenced by the orientation where measurements are made (the "oblique effect").
D000221:Adaptation, Ocular; D001288:Attention; D004193:Discrimination Learning; D005556:Form Perception; D006801:Humans; D011939:Mental Recall; D009949:Orientation; D010364:Pattern Recognition, Visual