Document Detail

Temporal discrimination in a long operant chamber.
MedLine Citation:
PMID:  12729976     Owner:  NLM     Status:  Publisher    
Pigeons were placed in a long chamber equipped with one key and feeder at each end side and one key and houselight at the middle. To obtain food the birds had to choose one side key after a short signal and the other side key after a long signal. The signals consisted of the illumination of the center key and the houselight and were initiated by a peck at the center key. The chamber had sensitive floor panels that enabled us to measure the location of the bird during the signals. In Experiment 1, after the birds learned the discrimination we reversed the assignment of keys to signals. In Experiment 2, we examined performance on two pairs of discriminations holding the same ratio. In Experiment 3, after the pigeons learned to discriminate two signals, we changed the duration of the long signal. The results showed that (a) the birds' motion during the signal was highly stereotypical, i.e. the birds moved to the short side, waited a few seconds, and then departed to, and stayed on the long side; (b) this motion pattern predicted the results of generalization tests with novel durations; (c) the mean of the times of departure from the short side approached its steady state values quicker than the standard deviation and consequently superposition of behavioral measures became stronger with training; (d) only the duration of the short signal influenced significantly the moment the birds departed from the short side; finally (e) the times of arrival at and departure from the short side were positively correlated, but the times of arrival and residence at the short side were negatively correlated.
Armando Machado; Richard Keen
Related Documents :
16812076 - Response rate and changeover performance on concurrent variable-interval schedules.
2795156 - Operant conditioning of head-waving in aplysia. iii. cellular analysis of possible rein...
1815616 - Directional dependence of intraocular transfer of stimulus detection in pigeons (columb...
14013166 - The role of temporal discriminations in the reinforcement of sidman avoidance behavior.
8953216 - Selectively 13c-enriched dna: evidence from 13c1' relaxation rate measurements of an in...
186106 - Separation and characterization of two distinct hemagglutinins contained in purified le...
Publication Detail:
Journal Detail:
Title:  Behavioural processes     Volume:  62     ISSN:  1872-8308     ISO Abbreviation:  Behav. Processes     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-May-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  -    
Other Details:
Languages:  ENG     Pagination:  157-182     Citation Subset:  -    
Instituto de Educação e Psicologia, Universidade do Minho, 4710, Braga, Portugal
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Toward a theory of variability discrimination: finding differences.
Next Document:  Theoretical note: simulating latent inhibition with selection neural networks.