Daily data collection of sexual and other health-related behaviors

Is daily data collection of sexual and other health-related behaviors reactive? This question was examined by exploring trends in daily reports of sexual intercourse, condom use, drinking, smoking, and vegetable and fruit consumption over a 2-month period. The trends were examined for evidence of fatigue effects and socially desirable responding. The effects of data collection method and gender were also examined. Results from a hierarchical linear modeling analysis showed a significant trend toward decreased reporting of drinking, smoking, and sexual intercourse, but no significant trends in fruit and vegetable consumption or condom use. These patterns are not consistent with fatigue effects or socially desirable responding. The results are discussed in relation to choosing data collection methods that minimize error.