The unbiased estimate of a "treatment effect" reached by analysis of covariance in a nonrandomized experiment would often require that a different covariate be used in each treatment. A sufficient but unlikely condition for an unbiased estimate is that the covariate for each treatment is (1) the complete covariate that predicts the outcome as…

This report discusses the importance of research on the ways in which educational institutions develop and adapt to their environments and examines three different approaches for conducting such research. Most of the report is organized into three major sections, each of which focuses on a different method of organizing and structuring research on…

This is one of a series of eight short monographs intended to aid practicing educators in planning and conducting accountability programs in schools. This booklet discusses how to develop an experimental design appropriate to the objectives of a particular research or evaluation effort. Short sections focus in turn on the characteristics of a good…

Research design sampling models regarding educational research of within-grade influences on overall educational experiences are discussed and limitations of each model noted. (DEP)

Defended is the concept of the self contained special classroom for educable mentally retarded students. (Author)

College student and adult subjects were studied in five experimental formats to gauge how well people can estimate the frequency of death from specific causes. Subjects tended to overestimate the rate of rare causes, underestimate likely causes, and be influenced by drama or vividness. (Author/SJL)

Although it makes a great deal of sense to attempt to design reading research so as to be able to generalize beyond the particular reading passages used in an experiment, the suggestion that tests of statistical significance are a necessary part of making valid generalizations is nonsense. (HOD)

The authors respond to criticism of their review of "Teaching Styles and Pupil Progress." They make further objections to the book's research design, compare various "teaching styles" studies, and suggest that the studies' findings are due to different amounts of time devoted to subjects by teachers with different objectives. (MF)

To investigate the quality of response to the personal interview, a survey was undertaken among Mexican-American migrant parents and children. Results demonstrate that the personal interview does not gather complete response. (Author/AM)

This paper comments on an anthropologist's field experience with a Chinese community in an American city. This particular community had mixed feelings about being studied, was composed of competing groups, and overtly attempted to manipulate the anthropologist's participation in community affairs. (Author/AM)

This paper examines the benefits of merging sociological methods by concentrating on the contribution of field observation prior to the designing of a survey study of black anti-Semitism. (Author)

Problems associated with the use of gain scores, analysis of covariance, multicollinearity, part and partial correlation, and the lack of rectilinearity in regression are discussed. Particular attention is paid to the misuse of statistical techniques. (JKS)

Contains recommendations for research priorities of the National Association for Research in Science Teaching (NARST) Study Committee. Promising areas in science education involving antecedent conditions; transactions, and outcomes are identified. Research styles and methodologies are also discussed. (CP)

This is the third in a sequence of three papers describing an investigation of fifth graders' ability to learn to distinguish between valid and fallacious inferences from simple conditional premises. This paper presents the research design and results. (MN)

The authors suggest that there may be a phenomenon of posttest sensitization which could affect the generalizability of experimental results in the way that pretest sensitization does. A quasi-experimental design is proposed to test for such a phenomenon. (JKS)