Field studies were conducted in homes, offices, and public places with younger and older adults to determine how legibility performance (in a proofreading and phone book search) changes with age and luminance. Homes and public places generally exhibited much lower than recommended luminance values for reading. Older adults had higher light levels in their homes than did younger adults at reading locations. Older adults performed less quickly than did younger adults on most legibility tasks. Adding light helped younger and older adults equally for most legibility tasks (in homes and public places), though increased luminance differentially improved the performance of older office workers. In response to feedback about low light levels, nearly 60% of building managers in public places indicated in a 6-month follow-up that they had improved lighting or were planning to do so. Actual or potential applications of this work include setting luminance guidelines for adults and identifying barriers to lighting changes.
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References
1.
Boyce, P. R., (1973). Age, illuminance, visual performance and preference, Lighting Research and Technology, 5(3), 125–144.
2.
Boyce, P. R., (1980). Human factors in lighting.Essex, England: Applied Science.
3.
Charness, N., & Bosman, E. A., (1992). Age and human factors. In F. I. M Craik. & T. A. Salthouse (Eds.), The handbook of aging and cognition (pp. 495–551). Mahwah, NJ: Erlbaum.
4.
Charness, N., & Bosman, E. A., (1994). Age-related changes in perceptual and psychomotor performance: Implications for engineering design. Experimental Aging Research, 20, 45–59.
5.
Charness, N., & Bosman, E. A., (1995). Compensation through environmental modification. In R. A. Dixon & L. Bäckman(Eds.), Compensating for psychological deficits and declines: Managing losses and promoting gains (pp. 147–168). Mahwah, NJ: Erlbaum.
6.
Cushman, W. H., & Crist, B., (1987). Illumination. In G. Salvendy (Ed.), Handbook of human factors (pp. 670–695. New York: Wiley.
7.
Fozard, J. L., (1990). Vision and hearing in aging. In J. E. Birren & K. W. Schaie(Eds.), Handbook of the psychology of aging (3rd ed., pp. 150–170). San Diego: Academic.
8.
Guth, S. K., Eastman, A. A., & McNelis, J. F., (1956). Lighting requirements for older workers. Illumination Engineering, 11, 656–660.
9.
Howell, W. C., (1997). Foreword, perspectives, and prospectives. In A. D. Fisk & W. A. Rogers(Eds.), Handbook of human factors and the older adult (pp. 1–6. San Diego: Academic.
10.
Hughes, P. C., & McNelis, J. F., (1978). Lighting, productivity, and the work environment. Lighting Research and Design, 8, 32–40.
11.
Hughes, P. C., & Neer, R. M., (1981). Lighting for the elderly: A psychobiological approach to lighting. Human Factors, 23, 65–85.
12.
Illuminating Engineering Society of North America (IESNA). (1993). Lighting handbook (8th Ed.).New York: Author.
13.
Jaschinski, W., (1982). Conditions of emergency lighting. Ergonomics, 25, 363–372.
14.
Kline, D. W., & Scialfa, C. T. (1996). Visual and auditory aging. In J. E. Birren & K. W. Schaie(Eds.), Handbook of the psychology of aging (4th ed., pp. 181–203). San Diego: Academic.
15.
Lawton, M. P. (1977). The impact of the environment on aging and behavior. In J. E. Birren & K. W. Schaie(Eds.), Handbook of the psychology of aging (pp. 276–301). New York: Van Nostrand Reinhold.
16.
Morrison, R. E., & Rayner, K. (1985). Legibility of phone directories: Reduction due to compressed print and disproportionate effects for the aged. In Proceedings of the Human Factors Society 29th Annual Meeting (pp. 231–234). Santa Monica, CA: Human Factors and Ergonomics Society.
17.
Petelka, S. D. (1990). Legibility factors and age differences. Unpublished master's thesis, University of Waterloo, Waterloo, Ontario, Canada.
18.
Rabbitt, P. M. A., Garwood, J., & Carmichael, A. (1992). Some constraints imposed by increasing age on users of “Multimedia” communication systems (Deliverable 9.1-3). Manchester, England: Age and Cognitive Performance Research Centre, University of Manchester.
19.
Rosenthal, N. E. (1993). Diagnosis and treatment of seasonal affective disorder. Journal of the American Medical Association, 270, 2717–2720.
20.
Rosenthal, R., & Rosnow, R. L. (1975). The volunteer subject.New York: Wiley.
21.
Ross, D. K. (1978). Task lighting-yet another view. Lighting Design and Application, 8, 37–43.
22.
Salthouse, T. A. (1996). The processing-speed theory of adult age differences in cognition. Psychological Review, 103, 403–428.
23.
Simmons, R. C. (1975). Illuminance, diversity and disability glare in emergency lighting. Lighting Research and Technology, 5(2), 125–132.
24.
Smith, S. W. (1978). Is there an optimum light level for office tasks?Journal of the Illuminating Engineering Society, 7, 255–258.
25.
Smith, S. W., & Rea, M. S. (1978). Proofreading under different levels of illumination. Journal of the Illuminating Engineering Society, 8, 47–52.
26.
Smith, S. W., & Rea, M. S. (1980). Relationships between office task performance and ratings of feelings and task evaluations under different light sources and levels. In Proceedings: 19th session. Commission Internationale de l'Eclairage (pp. 207–211). Paris: Bureau Central de la Commission Internationale de l'Eclairage.
27.
Statistics Canada. (1990). The General Social Survey of Canada (GSS). Ottawa, Ontario, Canada: Statistics Canada.
28.
Statistics Canada. (1991). The Health and Activity Limitation Survey (HALS). Ottawa, Ontario, Canada: Statistics Canada.
29.
Steenbekkers, L. P. A., & Beijsterveldt, C. E. M. van (Eds.). (1998). Design-relevant characteristics of ageing users.Delft. Netherlands: Delft University Press.
30.
Tinker, M. A. (1963). Legibility of print.Ames: Iowa State University Press.
31.
Vanderplas, J. H., & Vanderplas, J. M. (1981). Effects of legibility on verbal test performance of older adults. Perceptual and Motor Skills, 53, 183–186.
32.
Vanderplas, J. M., & Vanderplas, J. H. (1980). Some factors affecting legibility of printed materials for older adults. Perceptual and Motor Skills, 50, 923–932.
33.
Weale, R. A. (1963). The aging eye.London: H. K. Lewis.
