Because studies examining youth drug use often have data with a high proportion of zeros, they often do not meet the assumptions for univariate or linear regression analyses that are typically used. We demonstrate the use of zero-inflated negative binomial regression models to address excessive zeros in drug use frequency on perceptions of…

The popularity of online surveys has increased the prominence of using weights that capture units' probabilities of inclusion for claims of representativeness. Yet, much uncertainty remains regarding how these weights should be employed in analysis of survey experiments: Should they be used or ignored? If they are used, which estimators are…

Over the past decade, but especially in the past few years, programs with a "promise" label have been advanced at the local, state, and federal levels. To advance understanding of the design, implementation, and impact of the many different versions of emerging programs, policymakers, practitioners, and researchers need an organizing…

The purpose of this article is to clarify the discrepancy in the use of "queer" as a sexual identity classification in education survey research. This study extends the work completed by Dugan and Yurman (2011), who empirically demonstrated problems with treating LGB students as a homogenous population through collapsing all respondents…

Although definitions of validity have evolved considerably since L. J. Cronbach and P. E. Meehl's classic (1955) review, contemporary validity research continues to emphasize correlational analyses assessing predictor-criterion relationships, with most outcome criteria being self-reports. The present article describes an alternative way of…

The Department of Health in England released a new health research strategy in 2006 with far-reaching implications for both health research and research management. The explicit policy shift is towards centres of excellence and away from historical block allocations of funding to National Health Service (NHS) healthcare organisations--with these…

This study examined the roles of 3 multilevel motivational predictors in proteges' personal learning in teams: an autonomy-supportive team climate, mentors' autonomy support, and proteges' autonomy orientation. The authors followed 305 proteges in 58 teams for 12 weeks and found that all 3 predictors were positively related to the proteges'…

Latent class analysis (LCA) is a statistical method used to identify subtypes of related cases using a set of categorical or continuous observed variables. Traditional LCA assumes that observations are independent. However, multilevel data structures are common in social and behavioral research and alternative strategies are needed. In this…

Since Topping published his literature review on peer assessment in 1998, the number of studies on this subject has doubled, if not tripled. However, along with this expansion, the diversity of peer assessment applications increased equally fast. Based on recent literature, this contribution focuses specifically on the diversity that has come to…

Although interest in study abroad has grown consistently in recent decades, study abroad professionals and higher education scholars have been unable to explain or rectify the long-standing gender gap in study abroad participation. This study applies an integrated model of the student-choice construct to explore differences between male and female…

Objective: The National Institute of Mental Health funds institutional National Research Service Awards (NRSA) to provide postdoctoral research training. While peer-reviewed publications are the most common outcome measure utilized, there has been little discussion of how publications should be counted or what factors impact the long-term…

This study used baseline data from the Southwest sample of the Latino Acculturation and Health Project to examine whether familism and cohesion are related to problem behaviors in a sample of Mexican and Mexican-American adolescents in the Southwest United States. This study is important to practitioners and prevention and intervention researchers…

This article presents a study of academic procrastination and associated motivation variables in 508 adolescents from a general secondary school in central Turkey. Girls reported higher levels of self-efficacy for self-regulation and predicted higher Turkish grades than boys, but there was no difference in levels of procrastination. Academic…

In educational research, characteristics of the learning environment (e.g., social climate, instructional quality, goal orientation) are often assessed via student reports, and their associations with outcome variables such as school achievement or student motivation then tested. However, studying the effects of the learning environment presents a…

This study examined the relationship of internalized oppressions to the psychological distress of 304 lesbian and bisexual women. In addition, it investigated whether self-esteem and social support mediated the relationship between internalized oppressions and mental health. Results indicate that after controlling for education, internalized…