Understanding Age-Related Differences in the Perception and Comprehension of Symbolic Warning Information

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Abstract
The older segment of the population is living longer and remaining active after retirement. Consequently, many older adults are continuing to use common household products that may be associated with potentially serious hazards. Warning information accompanying these products, particularly those warnings in symbolic format, may not effectively convey their intended messages if they are difficult to interpret. In this study, survey data regarding symbol recognition, perception, and comprehension were collected from 865 individuals ranging in age from 17 to 91. The data indicate that older adults poorly comprehend a number of different warning symbols, despite believing symbols to be very helpful when interpreting warning information on products. Furthermore, symbol comprehension was not related to symbol recognition in older adults, suggesting that poor comprehension by this age group cannot be explained simply by low recognition levels. This paper discusses symbol perception, recognition, and comprehension, focusing on the importance of understanding age-related issues when designing warning systems.

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