https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Effects of study design and allocation on participant behaviour - ESDA: study protocol for a randomized controlled trial https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:8457 Wed 11 Apr 2018 09:57:23 AEST ]]> Social desirability bias in the reporting of alcohol consumption: a randomized trial https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29876 SD = 10) responded and were randomized: 1,778 to Group A and 1,816 to Group B. Outcome measures were the number of days they drank alcohol, the typical number of drinks they consumed per drinking day, and the number of days they consumed six or more drinks. The primary analysis included participants with any alcohol consumption in the preceding 4 weeks (1,304 in Group A; 1,340 in Group B) using between-group, two-tailed t tests. Results: In Groups A and B, respectively, means (and SDs) of the number of days drinking were 5.89 (5.92) versus 6.06 (6.12), p = .49; typical number of drinks per drinking day: 4.02 (3.87) versus 3.82 (3.76), p = .17; and number of days consuming six or more drinks: 1.69 (2.94) versus 1.67 (3.25), p = .56. Conclusions: We could not reject the null hypothesis because earlier questions about alcohol dependence and problems showed no sign of biasing the respondents’ subsequent reports of alcohol consumption. These data support the validity of university students’ reporting of alcohol consumption in web-based studies.]]> Fri 22 Apr 2022 10:24:39 AEST ]]>