Stimulus generalization and discrimination along the click-frequency (flutter) continuum in pigeons |
| |
Authors: | G. William Farthing |
| |
Affiliation: | 1. Department of Psychology, University of Maine, 04473, Orono, Maine 2. Eliot Hearst Indiana University, 47401, Bloomington, Indiana
|
| |
Abstract: | Before tests for click-frequency generalization, pigeons had been reinforced for keypecks during one click frequency (S+). Some Ss received S+ training only, whereas other Ss also received unreinforced (S?) trials, during which the clicks were either absent (Experiments 1-3) or presented at some other frequency (faster or slower than S+: Experiment 4). When training included S+ trials only, birds responded approximately equally to all generalization test frequencies (0.0 to 53.5 pulses/sec, pps). Most Ss that had received both S+ and S? training trials responded fastest not during S+ but during click frequencies even further away from S? along the click-frequency dimension (peak shift). Complex bimodal gradients were obtained after training with S+ (1.6 pps) vs S? (0.0 pps); maximal responding generally occurred near S+ and at approximately 14.2 pps. Among other factors, the “nonorthogonality” of click absence (0.0 pps) to the click dimension seems crucially involved in producing these complex effects. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|