Developmental changes in the duration of attention to unfamiliar stimuli in the rat.
Developmental changes in the duration of attention to unfamiliar stimuli in the rat.
复制标题
大鼠对不熟悉刺激的注意力持续时间的发育变化。
DOI：
10.1111/j.1469-8986.1992.tb01700.x
复制
发表时间：
1992
期刊：
影响因子：
3.7
通讯作者：
Campbell,BA
中科院分区：
文献类型：
--
作者：
Hayne,H;Richardson,R;Campbell,BA
The purpose of the present study was to examine developmental changes in the duration of attention to novel auditory stimuli in rats from infancy to adulthood. In all experiments, the cardiac component of the orienting reponse was used as the index of attention. In the first experiment 16‐, 23‐, 30‐, and 75‐day‐old rats were exposed to a novel auditory stimulus for 60 s. Animals of all four ages exhibited a marked decrease in heart rate in response to this stimulus. Although there were no significant effects of age on the magnitude of the cardiac response, there were dramatic developmental differences in thepersistenceof the response. The 16‐day‐old maintained a decrease in heart rate for the entire stimulus period, whereas heart rate returned to baseline in the 75‐day‐olds after only 40 s. The duration of the cardiac response of the 23‐and 30‐day‐olds was between these extremes.In Experiments 2A and 2B the effect of stimulus complexity on duration of the cardiac response was examined. Increasing stimulus complexity prolonged the deceleratory response in the 30‐day‐olds (Experiment 2A), and decreasing stimulus complexity decreased the duration of the cardiac response in the 16‐day‐olds (Experiment 2B).The results of these experiments were discussed in the context of Cohen's and Porges's two‐phase theories of attention. The findings demonstrate that the initialattention‐getting or reactivephase decreased substantially during development.
