The study dealt with a research environment in which the treatment effect is heterogeneous, and in which individuals use their assessments of the treatment effect to decide whether or not to enroll in an intervention program. In this article, a new methodology is proposed for examining the validity of the specified research environment in a given…

The sexual behaviors of HIV/sexually transmitted infection (STI) prevention intervention participants can be assessed on a partner-by-partner basis: in aggregate (i.e., total numbers of sex acts, collapsed across partners) or using a combination of these two methods (e.g., assessing five partners in detail and any remaining partners in aggregate).…

This article explores the statistical methodologies used in demonstration and effectiveness studies when the treatments are applied across multiple settings. The importance of evaluating and how to evaluate these types of studies are discussed. As an alternative to standard methodology, the authors of this article offer an empirical binomial…

This paper discusses conceptual and methodological issues surrounding the measurement of the construct, degree of implementation, drawn from a review of 74 previous studies which included such measures. Assessments against five measurement criteria indicate that an adequate scientific bias has not been established for this construct. (Author/PN)

The authors demonstrate how exponential smoothing can play a role in the identification of the intervention component of an interrupted time-series design model that is analogous to the role that the sample autocorrelation and partial autocorrelation functions serve in the identification of the noise portion of such a model. (Author/BW)

This article presents a method for disentangling the effects of an intervention from changes that are due to growth and regression to the mean. The method is illustrated in the context of evaluating the effect of the Special Supplemental Food Program for Women, Infants, and Children (WIC) on infant growth. (Author/LC)

Describes a method that uses program participants' compliance with program instructions as a means of classifying participants and in that way obtains a randomized control group for a subset of participants. Illustrates two variations of the method through a large smoking-intervention project. (SLD)

Evaluation research on vocational counseling in substance dependency treatment should distinguish between the effects of counselors and counseling methods on clients' employment outcomes. Three experimental designs permit investigation of possible confounds between these types of effects: (a) nested designs (each counselor delivers one counseling…

Based on a complex time series evaluation, a 2-year intervention in 40 supermarkets in Washington (DC) and Baltimore (Maryland) indicates that a nutrition education program could produce small but positive changes in consumers' food purchasing behavior. Limitations of the study and its implications for future evaluations are discussed. (SLD)

This article reviews factorial surveys and highlights their utility in designing intervention programs. It then describes two instances in which factorial surveys were used to develop HIV/AIDS-related interventions. It is concluded that factorial surveys have great potential for designing intervention programs. (SLD)

Behavior change interventions focusing on birth preparedness for pregnant women, their husbands, and adults in the community are common components of community-oriented Safe Motherhood programs in developing countries. Few studies have examined the effectiveness of these interventions, and existing studies are flawed due to study and sample…

This study describes a method for incorporating external estimates of intraclass correlation to improve the precision for the analysis of an existing group-randomized trial. The authors use a random-effects meta-analytic approach to pool the information across studies, which takes into account any interstudy heterogeneity that may exist. This…

This article presents a synopsis of each of seven presentations given at a conference on design and analysis in community trial studies. Papers identify problems with community trials and discuss strengths and weaknesses associated with design and analysis strategies. Areas of consensus are summarized. (SLD)

Using data from the evaluation of the Fast Track intervention, this article illustrates three methods for handling attrition. Multiple imputation and ignorable maximum likelihood estimation produce estimates that are similar to those based on listwise-deleted data. A panel selection model that allows for selective dropout reveals that highly…

Batterers with access to firearms present a serious lethal threat to their partners. The purpose of this exploratory study is to estimate the prevalence of and risk markers for gun possession among Massachusetts men enrolled in batterer intervention programs. The authors found that 1.8% of the men reported having a gun in or around their home.…