Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/52520
Título: | Unraveling sources of stimulus control in a temporal discrimination task |
Autor(es): | Pinto, Carlos André Ribeiro Oliveira Machado, Armando |
Palavras-chave: | Coding Timing Stimulus control Many-to-one matching Delayed matching-to-sample Pigeon |
Data: | Mar-2017 |
Editora: | Springer |
Revista: | Learning & Behavior |
Resumo(s): | In temporal discriminations tasks, more than one stimulus may function as a time marker. We studied two of them in a matching-to-sample task, the sample keylight and the houselight that signaled the intertrial interval (ITI). One group of pigeons learned a symmetrical matching-to-sample task with two samples (2 s or 18 s of a center keylight) and two comparisons (red and green side keys), whereas another group of pigeons learned an asymmetrical matching-to-sample task with three samples (2 s, 6 s, and 18 s) and two comparisons (red and green). In the asymmetrical task, 6-s and 18-s samples shared the same comparison. In a subsequent retention test, both groups showed a preference for the comparison associated with the longer samples, a result consistent with the hypothesis that pigeons based their choices on the duration elapsed since the offset of the houselight (i.e., sample duration + retention interval). Results from two no-sample tests further corroborated the importance of the ITI illumination as a time marker: When the ITI was illuminated, the proportion of choices correlated positively with the retention interval; when the ITI was darkened, choices fell to random levels. However, the absolute value of choice proportions suggested that the sample stimulus was also a time marker. How multiple stimuli acquire control over behavior and how they combine remains to be worked out. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/52520 |
DOI: | 10.3758/s13420-016-0233-2 |
ISSN: | 1543-4494 |
e-ISSN: | 1543-4508 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito autor |
Aparece nas coleções: | CIPsi - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Pinto, Machado - 2017 - Unraveling sources of stimulus control in a temporal discrimination task.pdf Acesso restrito! | 592,15 kB | Adobe PDF | Ver/Abrir |