Age effects on random-array letter cancellation tests.

Neuropsychiatry, neuropsychology, and behavioral neurology Pub Date : 1999-01-01

D S Geldmacher, T M Riedel

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Abstract

Objective: This study was designed to determine whether young and older adults differ in the spatial pattern of omission errors on random-array letter cancellation tasks.

Background: Aging is associated with declines in the speed or efficiency of visual information processing. It is unclear whether the spatial characteristics of visual exploration also change with aging.

Method: Thirty young adults and 30 older adults each completed 21 random-array cancellation forms. Forms were systematically varied in paper size, target-to-distractor ratio, stimulus density, and target number.

Results: The spatial distribution of errors was not random for older adults. Younger adults expressed a trend toward nonrandom error location, but the spatial distribution did not differ between groups. There was also a strong trend toward more errors per subject in the older group. Older subjects required more time for task completion.

Conclusions: The findings are consistent with a generalized age-related decline in the speed or efficiency of visual search, but the spatial properties of directed attention do not appear to be different between young and older adults.

本刊更多论文

年龄对随机数组字母消去测试的影响。

目的:本研究旨在确定年轻人和老年人在随机字母消去任务中遗漏错误的空间模式是否存在差异。背景:衰老与视觉信息处理速度或效率的下降有关。目前尚不清楚视觉探索的空间特征是否也随着年龄的增长而改变。方法:30名年轻人和30名老年人各填写21份随机排列的取消表格。形式系统地改变纸张大小，目标与干扰物的比例，刺激密度和目标数量。结果:误差的空间分布不具有随机性。青壮年表现出非随机误差定位的趋势，但空间分布在各组之间没有差异。在年龄较大的人群中，每个受试者的错误也有明显的趋势。年龄较大的受试者需要更多的时间来完成任务。结论:这些发现与视觉搜索速度或效率的普遍年龄相关的下降是一致的，但定向注意的空间特性在年轻人和老年人之间似乎没有区别。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Neuropsychiatry, neuropsychology, and behavioral neurology

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