摘要(英) |
In the development of daylight glare models, the main factors accounted for the variations in discomfort glare index are visual physiological conditions, psychological cognitions, characteristics of the light source, and environmental variables. Knowing how to classify and rank the factors will offer a direction for correcting the models. Accordingly, this study adopted questionnaire survey to explore the situation of printed-text reading among college students in National Central University, Taiwan, and utilized exploratory factor analysis to analyze and classify the data. Based on the good reliability of the questionnaire statistics, ten factors were selected by ranking their arithmetic means. A conjoint-analysis card-ranking experiment was executed to evaluate the relative importance among the ten factors. In addition, five adjustable factors were chosen from the questionnaire to construct a physical-experience experiment. Conjoint analysis with scale rating was used to evaluate the relative importance among the five adjustable factors. The results of this study were summarized as follows:
1.For NCU’s students, thirdteen factors were found to make up the situation of printed-text reading, including (based on the mean values from high to low) visual fatigue, physical condition, mental condition, local lighting design, reading material, natural lighting design, paper and typesetting, temperature and ventilation, aesthetic response, interior lighting design, climatical factor, concealment, environmental protection and energy-saving. The preceding ten factors ranked by their relative importance from high to low are physical condition, visual fatigue, mental condition, reading material, local lighting design, natural lighting design, temperature and ventilation, interior lighting design, aesthetic response, paper and typesetting.
2.The five adjustable factors sorted by their relative importance from high to low are window curtain, ambient light color, ambient illuminance, distance from window to worker, and usage of desk lamp.
The results offered thirdteen factors accounted for visual comfort in printed-text reading, and suggest that subjective physiological conditions should be a prior factor in correcting current glare models.
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