OBJECTIVES To develop best practice guidance for the use of retention strategies in randomized clinical trials (RCTs). STUDY DESIGN AND SETTING Consensus development workshops conducted at two UK Clinical Trials Units. Sixty-six statisticians, clinicians, RCT coordinators, research scientists, research assistants, and data managers associated with RCTs participated. The consensus development ...

BACKGROUND There is a need for improving cohort retention in longitudinal studies. Our objective was to identify cohort retention strategies and implementation approaches used in studies with high retention rates. METHODS Longitudinal studies with ≥200 participants, ≥80% retention rates over ≥1 year of follow-up were queried from an Institutional Review Board database at a large research-inte...

This study was an attempt to investigate whether teaching critical reading strategies had any significant effect on intermediate EFL learners’ vocabulary retention. To fulfill the purpose of this study, 72 male and female students within the age range of 17 to 32 years studying at Farzan and Farzanegan language schools in Tehran at intermediate level were selected from a total number of 114 par...

Humans deploy various strategies to solve adaptive problems associated with a long-term partner’s infidelity. We investigated the relationships among three such strategies: individual mate retention, coalitional mate retention (i.e., mate retention with assistance from allies), and in-pair copulation frequency. Participants (n = 387; 176 women) in a committed, heterosexual relationship reported...