Measuring the search image: expectation, detection, and recognition in pigeon visual search.
Pigeons searched computer screens for a grating target that varied in spatial frequency and orientation. In Experiment 1, a pretrial cue signaled that a particular target would appear. The cue speeded response to this primed target and to targets of the same orientation and similar spatial frequency to the primed target. However, the cue slowed search for targets differing from the primed target in orientation. In Experiment 2, pecks to a single target were reinforced. Responding generalized somewhat to targets of spatial frequency similar to the primed target and to targets of either orientation. Thus, stimulus aspects that affect detection may differ from those that affect recognition; if a common representation serves both, it functions differently in the 2 cases.
Blough
Donald S
DS
Department of Psychology, Box 1853, Brown University, Providence, Rhode Island 02912, USA. donald_blough@brown.edu
D000704:Analysis of Variance; D000818:Animals; D001070:Appetitive Behavior; D001288:Attention; D010856:Columbidae; D004193:Discrimination Learning; D005260:Female; D009949:Orientation; D011930:Reaction Time; D021641:Recognition, Psychology; D012054:Reinforcement, Psychology; D017603:Signal Detection, Psychological; D012858:Size Perception; D013028:Space Perception; D014796:Visual Perception