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Objective: To examine the influence of body mass index (BMI), sex, and race on college students' optimistic bias (OB) concerning the healthiness of their own lifestyles relative to the "average college student" and best friends. Design: Cross-sectional survey. Setting: Large university campus. Participants: College students recruited from first-year classes (1,398 female, 985 male). Variables Measured: Student height, weight, sex, race, and assessments of lifestyle healthfulness for self, best friends, and the "average college student." Analysis: Paired 2-way t tests compared lifestyle ratings for self and others. One-way analyses of variance compared differences between BMI categories. Tukey Honestly Significant Difference tests tested all pair- wise comparisons. Analyses of covariance controlling for BMI scores tested sex and race differences (P < .05). Results: College students in all BMI categories were optimistically biased in comparisons to the average college student. Optimistic bias differences were significantly smaller, however, for self and close friends. Sex and race also influenced the extent and nature of OB judgments. Conclusions and Implications: Optimistic bias may limit students' willingness to adopt and maintain more healthful behaviors. Optimistic bias can be reduced or even eliminated if close friends are specified as comparative targets. Health education campaigns, particularly those using socially normative approaches, should consider the impact of comparative target, sex, and race on OB. [ABSTRACT FROM AUTHOR]

Objective: This paper presents the reliability and validity of a "competing food choice" construct designed to assess whether factors related to consumption of less-healthful food were perceived to be barriers to fruit and vegetable consumption in college freshmen. Design: Cross-sectional, self-administered survey. Setting: An urban public college with a large, diverse student population. Participants: A convenience sample of 408 college freshmen. Variables Measured: A "competing food choice" construct and fruit and vegetable intake. Analyses: Factor analysis, Cronbach α, and correlation coefficients were used to determine the reliability and validity of the construct. Results: Three factors were produced from the factor analysis of the 11-item competing food choice construct: "competitive food" barriers (Cronbach α = 0.73), fruit and vegetable-related "time" barriers (Cronbach α = 0.67), and "quality" barriers (Cronbach α = 0.64). Construct validity assessments revealed significant inverse correlations between fruit and vegetable consumption and competitive food barriers (r = -0.15, p < .01 current and r = -0.25, P < .01 prior) and time barriers (r = -0.12, P < .05 current and r -0.10, P < .05 prior). Conclusions and Implications: This "competing food choice" construct demonstrated satisfactory reliability and construct validity among college freshmen. [ABSTRACT FROM AUTHOR]