Reports on the re-examination of recent underestimates of the number of adoptions of foster care children. Notes that underestimates resulted from under-reporting by states, use of inappropriate data as estimate bases, and real increases in the number of adoptions. (DLH)

This rejoinder to comments on a previous article about research on the person-environment fit (PEF) model addresses issues in the relationship of congruence to vocational outcomes, the circumplex model, tests of Holland's hexagonal model, and advances in PEF theory and research. (Contains 61 references.) (SK)

Without acknowledging the privileged position from which physicians conduct research, their inquiry into nursing practice can lead only to a "physician" interpretation of nursing that is likely to be inaccurate and inadequate. (Author/SK)

Evidence that genetic factors play a significant role in susceptibility for autism is reviewed, especially: (1) chromosomal abnormalities associated with autism; (2) single gene disorders associated with autism; and (3) twin and family studies of autism. However, recent genetic studies have failed to locate any genes having a major effect on…

Finding a periodic solution to a nonlinear ordinary differential equation is in general a difficult task. Only in a very few cases can direct methods be applied to an equation to find initial values leading to a solution of the corresponding initial value problem that is periodic. Oscillatory periodic solutions have such practical importance that…

The What Works Clearinghouse (WWC) provides online reports to the public about the scientific evidence for educational interventions. The quality of these reports is important because they effectively tell the non-scientific community which programmes do and do not work. The aim of this brief review is to assess WWC's report on a clinically…

One goal of basic research in education is to identify the variables of effective instruction. As this pursuit has been conceived, however, its theoretical problems make it unlikely that the effort will provide a clear picture of instructional variables, their interactions, or the kind of teacher training that is implied by instructional variables.

Classic parametric statistical significance tests, such as analysis of variance and least squares regression, are widely used by researchers in many disciplines, including psychology. For classic parametric tests to produce accurate results, the assumptions underlying them (e.g., normality and homoscedasticity) must be satisfied. These assumptions…

This article addresses ethical dilemmas experienced by street-level research and evaluation workers recruiting and gathering data in community-based research projects. The authors focus on a subgroup of street-level research workers, whom they call research extenders (REs), employed because they share important characteristics with the target…

This highly readable text demystifies the qualitative research process--and helps readers conceptualize their own studies--by organizing the different research paradigms and traditions into coherent clusters. Real-world examples and firsthand perspectives illustrate the research process; instructive exercises and activities build on each other so…

The dominant literature on research synthesis methods has positivist and neo-positivist origins. In recent years, the landscape of research synthesis methods has changed rapidly to become inclusive. This article highlights methodologically inclusive advancements in research synthesis methods. Attention is drawn to insights from interpretive,…

Problems related to the study of second language learners are described, and the factors affecting language development are discussed. Factors influential in second language learning include psychological, sociological, and affective aspects. Similarly, the measurement of language has been influenced by linguistic, psychological, and social…

Contemporary scholars researching the courts' impact on schools would profit from examining the well-funded studies conducted in the 1960s and early 1970s. This article discusses the substance of early judicial impact research and explores its relevance for today. Most 1960s impact studies dealt with United States Supreme Court decisions in three…

A year-long case study of the effects of an educational and vocational rehabilitation program in a youth training center was discussed in terms of fourteen issues which might threaten the validity of an evaluation or research project. This correctional institution housed women aged 14 to 21 who were long-term wards of the state, held on remand, or…

Although there has been a significant amount of research on the families of drug abusers, this field has encountered a number of obstacles to its continued growth. Some of these problems include an emphasis of research on opiate use, methodological hindrances, and lack of a constituency. A review of two concurrent national processes, the White…