Replicating previously reported empirical research is a necessary aspect of an evidence-based field of special education, but little formal investigation into the prevalence of replication research in the special education research literature has been conducted. Various factors may explain the lack of attention to replication of special education…

The paper discussed the difficulties and problems in experimental researches in educational technology, such as misunderstanding in teachers' concept, disjointedness between theory and practice, inadequate understanding of dialectics in experimental educational technology researches, research project selection and theoretical hypothesis formation…

An experiment is described which uses a real-world sample of lawn fertilizer in a simple exercise to illustrate problems associated with the sampling step of a chemical analysis. A mixed-particle fertilizer containing discrete particles of iron oxide (magnetite, Fe[subscript 3]O[subscript 4]) mixed with other particles provides an excellent…

This article discusses the use of propensity scoring in experimental program evaluations to estimate impacts for subgroups defined by program features and participants' program experiences. The authors discuss estimation issues and provide specification tests. They also discuss the use of an overlooked data collection design--obtaining predictions…

REPORTS ON THE EFFECTIVENESS OF THE INITIAL TEACHING ALPHABET (I.T.A.) FOR INSTRUCTION IN BEGINNING READING SHOULD BE CONSIDERED WITH CAUTION. SINCE NO DETAILED DESCRIPTION OF THE EXPERIMENTAL DESIGNS USED IS AVAILABLE, EDUCATORS FAIL TO ASSESS RESULTS OBJECTIVELY AND ARE MISLED BY DRAMATIC GAINS WHICH REFER TO SPECIAL CONDITIONS. HAWTHORNE…

Critiques research findings on the effectiveness of the Early Intervention Project (EIP) for children with autism. The review finds sufficient threats to the experimental validity of the EIP to prevent unqualified endorsement of it as a validated treatment for children with autism. The review found in particular there were threats to external…

To compare the effectiveness of the traditional and the experimental approaches to Head Start classrooms, 68 children and six teachers in San Francisco participated in an educational experiment. The traditional approach emphasizes the children's internal motivation resulting from spontaneous free play and warm, accepting teachers, while the…

Concludes that in addition to using multivariate methods to analyze their data, investigators need to begin thinking in terms of large-scale randomized controlled field trails (i.e., experiments). One of the challenges for the ethnographic educational researcher is to demonstrate the superiority of the anthropological field method over the more…

Group-randomized trials (GRTs)--studies that evaluate the efficacy or effectiveness of interventions occurring at the group level--are increasingly used to assess the effects of school-based prevention programs on behavioral outcomes of children and adolescents. These designs pose many implementation and design challenges for school…

This study addresses itself to the quality of evaluation research on compensatory education programs, the knowledge based on such evaluations as to the effectiveness of compensatory education, and the implications of the data that need to be examined for future planning of such programs and for designing studies to test their effectiveness.…

This study was initiated in 1964 under the sponsorship of the Cooperative Research Program of the Office of Education to develop and supply data useful to policy makers and planners of training programs for research, development, and diffusion personnel in education. The first task was the construction of a logical structure to account for the…

Several problems that an evaluator of an experimental college has to face and resolve are considered. These include: (1) the purpose of the evaluation and the role of the evaluator, (2) the utility of a research design model, (3) the specificity of program goals before the evaluation is planned, and (4) the appropriateness of standardized or local…