Document Detail


Adaptation level effects in discrimination of flicker frequency.
MedLine Citation:
PMID:  14744551     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Pigeons accustomed to food reinforcement for responding in the presence of a 25-Hz flickering light were exposed to several sets of flicker-frequency stimuli arranged as increasing and decreasing series. In the first experiment, food was occasionally delivered for key pecks during 30-s periods of 25-Hz flicker appearing at the beginning, midway, and at the end of an ascending and descending series of nine frequencies, ranging from 13 to 37 Hz. These stimuli appeared for 15-s periods with no food available (extinction). Gradients of responding to flicker values in the ascending series differed from those in the descending series, showing displacements in peak responding toward the lower and higher frequency values, respectively. The same effects occurred when the sequence was changed so that a descending series was followed by an ascending series of frequencies. These effects are consonant with an adaptation level (AL) interpretation and were replicated in a second experiment in which durations of the extinction presentations were increased to 30s. In a final condition, only a descending series was presented and displacement of peak responding from 25 Hz to a higher frequency stimulus, 28 Hz, was observed.
Authors:
John C Malone; Maria E A Armento; Rita M Nemeth; Eric J Billington; Candice N Carpenter; K Brooke Andrews
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Behavioural processes     Volume:  65     ISSN:  0376-6357     ISO Abbreviation:  Behav. Processes     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2005-10-13     Completed Date:  2005-11-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  95-109     Citation Subset:  IM    
Affiliation:
Department of Psychology, University of Tennessee, Psychology, Knoxville, TN 37996-0900, USA. jcmalone@utk.edu
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Psychological*
Animals
Columbidae
Discrimination (Psychology)*
Generalization (Psychology)
Psychological Theory
Reinforcement (Psychology)

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