Biasing Performance Through Differential Payoff in a Temporal Bisection Task

被引:4
|
作者
Cambraia, Renata [1 ]
Vasconcelos, Marco [2 ,3 ]
Jozefowiez, Jeremie [4 ]
Machado, Armando [1 ]
机构
[1] Univ Minho, Sch Psychol, Braga, Portugal
[2] Univ Aveiro, Dept Biol, Dept Educ & Psychol, Aveiro, Portugal
[3] CESAM, Ctr Environm & Marine Studies, Aveiro, Portugal
[4] Univ Lille, Lab Affect & Cognit Sci, SCALAB UNR 9193, Lille, France
关键词
timing; bisection task; differential payoff; response bias; motion patterns; BEHAVIORAL-THEORY; TIME; DISCRIMINATION; CHOICE; PACEMAKER; PROBABILITY; MAGNITUDE; PIGEONS; SHIFTS; RATES;
D O I
10.1037/xan0000192
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
We investigated how differential payoffs affect temporal discrimination. In a temporal bisection task, pigeons learned to choose one key after a short sample and another key after a long sample. When presented with a range of intermediate samples they produced a Gaussian psychometric function characterized by a location (bias) parameter and a scale (sensitivity) parameter. When one key yielded more reinforcers than the other, the location parameter changed, with the pigeons biasing their choices toward the richer key. We then reproduced the bisection task in a long operant chamber, with choice keys far apart, and tracked the pigeons' motion patterns during the sample. These patterns were highly stereotypical-on the long sample trials, the pigeons approached the short key at sample onset, stayed there for a while, and then departed to the long key. The distribution of departure times also was biased when the payoff probabilities differed. Moreover, it is likely that temporal control decreased while control by location increased. No evidence was found of changes in temporal sensitivity. The results are consistent with models of timing that take into account bias effects and competition of stimulus control.
引用
收藏
页码:75 / 94
页数:20
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