Safe-Sex Knowledge, Sexual Behavior, and Drug Use A thesis
Safe-Sex Knowledge, Sexual Behavior, and Drug Use A thesis
Safe-Sex Knowledge, Sexual Behavior, and Drug Use A thesis
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
interests of the target population. Each person referred was then offered the opportunity<br />
to refer others, up until the end of the data collection period.<br />
The study was advertised on the web <strong>and</strong> at local relevant events <strong>and</strong><br />
establishments. Open referrals, those men who learned of the study without having a<br />
specific referral, were also permitted. The data were planned to be collected over the<br />
course of 30 days to ensure that there would be sufficient time for multiple level referrals,<br />
which have the effect of obtaining members of different parts of the population for the<br />
sample. However, the time period was extended an additional two weeks to collect data<br />
from a sizable number of promised referrals.<br />
Sampling error is a concern, particularly since this is not a r<strong>and</strong>om sample.<br />
Budget restrictions on rewards for respondents, as well as time restrictions on staff<br />
(including myself) to be available to provide <strong>and</strong> collect the self-administered<br />
questionnaires, did limit the sample size. While power analysis yielded a best sample<br />
size of just over 300 (.80; alpha = 0.05), the sample size was, in part, determined by the<br />
ratio of openly gay men continuing to be added to the sample. It was important to have<br />
sufficient numbers of actively <strong>and</strong> passively closeted men in the sample; however, there<br />
is no known proportion of existence in the population. These strata are used for group<br />
comparison <strong>and</strong> general representation. With quotas in mind, the option was available to<br />
screen out c<strong>and</strong>idates as the questionnaires continued to be collected. Variables<br />
including demographic characteristics <strong>and</strong> identity management (open/closeted) were<br />
monitored daily. Since the demographic variables were generally in line with the Kern<br />
County general population, there was no need to institute a screen. <strong>Use</strong> of a detailed<br />
quota screen can also undermine the effectiveness of RDS sampling. The data collection,<br />
9