Conducted studies using two perspectives for obtaining evidence relevant to validity of autobiographical data. In Study 1, construct validity of standard psychological constructs (assertiveness, trustworthiness) obtained from autobiographies was equal to that of standard instruments designed to assess these constructs. Evidence for validity of…

A report from the School Choice Demonstration Project examines issues concerning the funding formula used for the Milwaukee Parental Choice Program (MPCP). It finds that the program generates a net saving to taxpayers in Wisconsin but imposes a significant fiscal burden on taxpayers in Milwaukee. However, these findings depend significantly on how…

Treatment integrity (also referred to as "treatment fidelity," "intervention integrity," and "procedural reliability") is an important methodological concerning both research and practice because treatment integrity data are essential to making valid conclusions regarding treatment outcomes. Despite its relationship to validity, treatment…

This Buckeye Institute policy brief sets out to document problems and inequities in charter school finance in Ohio, but it falls short in providing a comprehensive presentation of evidence. It ignores relevant research literature and extensive findings from the official state evaluation. It incorrectly assumes that charter schools serve the same…

The epistemological status of factors--that is, components, common factors, and image factors--is briefly discussed. Implications for the number of factors problem of varying views of factor analysis and the particular factor analytic model employed are noted, and the rationales underlying the best known decision rules regarding the correct number…

Construct validation theory is founded upon conflicting metaphysical principles, methodological approaches, and standards of adequacy. This paper explores these unrecognized conflicts and indicates some consequences that these conflicts have for construct validation theory. (Author/PN)

The purposes of this article are, first, to argue that analyses based on level of treatment implementation can lead to biased estimates of treatment effects, and second, to discuss alternatives to this approach. (PN)

Ridge regression offers advantages over ordinary least squares estimation when a validity shrinkage criterion is considered. Comparisons of cross-validated multiple correlations indicate that ridge estimation is superior when the predictors are multicollinear, the number of predictors is large relative to sample size, and the population multiple…

External and implementation factors and their potential threats to field test validity and the practical realities of the field testing process on results are discussed. External factors include site selection, negotiations, contracts, site monitoring, training, and type of product. Implementation factors include motivation, dependence on local…

Problems associated with randomization tests in single- case experiments are discussed. This article follows a discussion of randomization tests in single case studies in the same issue of this journal. (See TM 505 799; 505 801).(Author/JKS)

Examined seven-year adolescent panel to determine whether attrition effects varied by type of substance assessed and method of measurement. Found study dropouts were more likely to use substances and reported higher mean use of substances at baseline than stayers; attrition effects varied by substance; and mean use comparisons were more likely to…

Rejoinders to the preceding commentaries include "Who Claims Holland's Hexagon Is Perfect?" (Prediger, Vansickle); "Comments on the Universality of Holland's Theory" (Fouad, Dancer); and "In Search of Structural Validity" (Swanson). (SK)

Addresses two vital issues in international studies of educational achievement: the quality of data obtained from participating countries and the interpretation of those data. Contends that examples of problems in item development for international studies are related to the quality of the data and norms used in interpretation. (Author/NB)

Compared alprazolam, imipramine, and placebo in the treatment of panic disorder patients (n=59) to investigate concerns about the internal validity of the double-blind design. Found that the great majority of patients and physicians were able to rate accurately whether active drug or placebo had been given and physicians could distinguish between…

Addresses concerns about the trustworthiness of research results derived from image-based data, particularly questions of validity assessment. Compares examples of such research to provide an illustration of these issues. Presents a tentative strategy for ensuring trustworthiness based on five criteria: completeness, interpretive adequacy,…