A diffusion model analysis of the effects of aging on letter discrimination.
A diffusion model analysis of the effects of aging on letter discrimination.
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DOI：
10.1037/0882-7974.18.3.415
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发表时间：
2003-09
影响因子：
3.7
通讯作者：
A. Thapar;R. Ratcliff;G. McKoon
中科院分区：
文献类型：
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作者：
A. Thapar;R. Ratcliff;G. McKoon
在针对年轻和年长受试者的字母辨别实验中，研究了衰老对准确性和响应时间的影响。结果显示，年龄较大的受试者（60-75 岁）通常比年轻受试者速度慢且准确度较低。 R. Ratcliff (1978) 的扩散模型适合数据，它很好地说明了响应时间、响应时间的分布和响应精度。结果与 R. Ratcliff、A. Thapar 和 G. McKoon (2001) 的结果对响应时间的非决策部分（大约减慢 50 毫秒）和响应标准（更保守的设置）产生类似的年龄影响，但也显示老年受试者的证据积累率降低。基于模型的方法的优点是可以分离老化对不同处理组件的影响。
The effects of aging on accuracy and response time were examined in a letter discrimination experiment with young and older subjects. Results showed that older subjects (ages 60-75) were generally slower and less accurate than young subjects. R. Ratcliff's (1978) diffusion model was fit to the data, and it provided a good account of response times, their distributions, and response accuracy. The results produce similar age effects on the nondecision components of response time (about 50 ms slowing) and the response criteria (more conservative settings) to those from R. Ratcliff, A. Thapar, and G. McKoon (2001), but also show a reduced rate of accumulation of evidence for older subjects. The model-based approach has the advantage of allowing the separation of aging effects on different components of processing.