Agrees with the power of randomized clinical trials, but makes the case that random assignment raises other, unanticipated threats to internal validity as a result of failing to consider treatment preference in research participant behavior. Reviews benefits and limitations of research strategies that augment randomization while respecting…

Little is known about effective eHealth recruitment methods. This paper presents recruitment challenges associated with enrolling African-American girls aged 8-10 years in an eHealth obesity prevention program, their effect on the recruitment plan, and potential implications for eHealth research. Although the initial recruitment strategy was…