For the first time in twenty years the U.S. Department of Health and Human Services (DHHS, 2009) is considering changes to federal regulations governing research. The Common Rule provides the basis for government regulations and Institutional Review Boards (IRB). Proposed changes will have a significant impact on Institutional Review Board…

In this article, we directly question the common practice in growth mixture model (GMM) applications that exclusively rely on the fitting model without covariates for GMM class enumeration. We provide theoretical and simulation evidence to demonstrate that exclusion of covariates from GMM class enumeration could be problematic in many cases. Based…

Discusses ways of reducing violence in America involving the integration of scientific approaches and youth violence intervention and community programs that address both family and social environments. The paper argues that these efforts exemplify the notion that violence is more a product of racism and poverty than of race. (GR)