Interactions of numerical and temporal stimulus characteristics on the control of response location by brief flashes of light.
Pigeons pecked on three keys, responses to one of which could be reinforced after 3 flashes of the houselight, to a second key after 6, and to a third key after 12. The flashes were arranged according to variable-interval schedules. Response allocation among the keys was a function of the number of flashes. When flashes were omitted, transitions occurred very late. Increasing flash duration produced a leftward shift in the transitions along a number axis. Increasing reinforcement probability produced a leftward shift, and decreasing reinforcement probability produced a rightward shift. Intermixing different flash rates within sessions separated allocations: Faster flash rates shifted the functions sooner in real time, but later in terms of flash count, and conversely for slower flash rates. A model of control by fading memories of number and time was proposed.
Department of Psychology, Indiana University Purdue University, 402 N. Blackford St, Indianapolis, IN 46202, USA. gfetter@iupui.edu
J Gregor
JG
Fetterman
P Richard
PR
Killeen
D000818:Animals; D010856:Columbidae; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D012055:Reinforcement Schedule; D013998:Time Perception / Q000502:physiology*
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