Pattern discrimination in the hummingbird eupetomena macroura macroura (1994)
- Authors:
- Autor USP: VENTURA, DORA SELMA FIX - IP
- Unidade: IP
- Subjects: AVES; COR; PERCEPÇÃO (PSICOLOGIA); PSICOLOGIA EXPERIMENTAL
- Language: Inglês
- Abstract: Discrimination studies in hummingbirds have been done in the field, with free access to a feeder (Goldsmith, 1979/1981) or in captivity, with controlled deprivation, in a single stimulus training situation (Takase and Ventura, 1991; Takase, 1992). Objectivs. 1. To develop a procedure for studies using an associative learning paradigm in hummingbirds; 2. to investigate discrimination and generalization, as well as differential threshold for patterns representing stylized flower and bud. Method. Daily 1 hs sessions conducted in an indoor living cage (4x2x2.5m) were run after 3 hs of sugar water deprivation. S+ and S- were produced in a vídeo monitor. A microcomputer programmed stimulus presentation (alternately in the first 20 and randomly in the last 3 sessions), with reinforcement (sugar water) available during S+ periods., and recorded the number and duration of the bird´s approach responses (detected by a photocell close to the feeder). Experiments run were: 1. discriminative training of the stimuli. 2. generalization testing using the stiluli the lenght of S+ "petals" from 3 cm to 0,2 cm. Results. The bird spent 90% of time next to the stimuli during S+ periods. IN generalization testing response durations were equally low for S- and all imcomplete stimulli. Threshold for "petal" lenght was achieved at 0.2 cm. Conclusions. Behavioral experiments are easily run in hummingbirds, wich readily adapt to the laboratory situation. S+ and S- were perfectly discriminated. The behavior was controlled by the complete stinulus with no specific part of the pattern having been attended to, as shown by the generalization tests. Differential threshold corresponded to about degree of visual angle, considering the closest distance of observation
- Imprenta:
- Conference titles: Reuniao Anual da Fesbe
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ABNT
WATANABE, S. e TAKASE, E. e VENTURA, Dora Selma Fix. Pattern discrimination in the hummingbird eupetomena macroura macroura. 1994, Anais.. Caxambu: Instituto de Psicologia, Universidade de São Paulo, 1994. . Acesso em: 23 abr. 2024. -
APA
Watanabe, S., Takase, E., & Ventura, D. S. F. (1994). Pattern discrimination in the hummingbird eupetomena macroura macroura. In . Caxambu: Instituto de Psicologia, Universidade de São Paulo. -
NLM
Watanabe S, Takase E, Ventura DSF. Pattern discrimination in the hummingbird eupetomena macroura macroura. 1994 ;[citado 2024 abr. 23 ] -
Vancouver
Watanabe S, Takase E, Ventura DSF. Pattern discrimination in the hummingbird eupetomena macroura macroura. 1994 ;[citado 2024 abr. 23 ] - Situação das neurociências no Brasil: neurociências clínicas: disciplinas básicas
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