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Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsJames F. SallisJames F. Sallis, Ph.D. and Brian E. Saelens, Ph.D. are with the Department of Psychology at San Diego State University.Brian E. SaelensJames F. Sallis, Ph.D. and Brian E. Saelens, Ph.D. are with the Department of Psychology at San Diego State University.
Sallis et al. (Thu,) studied this question.