Few meaningful sex differences will be reported if investigators go beyond the reporting of statistical significance to determine the indices of experimental effect size. Techniques for obtaining this type of information include the calculation of d and the estimate of omega squared, which indicate the advisability of continuing a line of…

A study was conducted by the Navy to develop and evaluate human performance reliability estimates for electronic maintenance. Data were collected using the Personnel Identification Information Forms, the Technical Proficiency Checkout Form, and the Job Performance Questionnaire. On the basis of the total number of uncommonly effective and the…

The linearly ordered content domain (LOCD) concept is discussed. A logistic analysis of the occurrence of first introduction of spelling words into the curriculum is presented, the results, along with word length, number of neutralized vowels, and an index of word familiarity are used to predict word location on the spelling LOCD. (Author/DWH)

Virtually all parametric statistical procedures have been shown to be special cases of canonical correlation analysis. This article proposes a logic for conducting stepwise canonical correlation analyses, based upon evaluation of canonical communality coefficients. The procedure is a direct analogue of stepwise multiple regression. (Author/RD)

Describes a model hypothesizing that differential service prescription based on client characteristics improves successful rehabilitation outcome. Studies the validity of this model using entry characteristics and services rendered to Goodwill Industries clients (N=445) as independent variables. Treatment outcome or placement was the criterion.…

Compares the uses of multiple regression, the Automatic Interaction Detector (AID) multivariate program, and cross-tabular analysis in identifying variables associated with newspaper readership. (RL)

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The value-added indicator is a more conceptually appropriate indicator of school performance than average and median test scores, since it tries to account for influential nonschool factors and isolate these from schools' contributions to student progress. This paper defines two types of value-added indicators and shows their appropriateness for…

Discusses three topics related to interpretation of discriminant analyses (DA's): (1) partial F ratios and partial Wilks's lambdas for predictor variables in standard, step-down, and stepwise DA's; (2) relation of goals of classification to definition/evaluation of classification rules; and (3) significance tests for total hit rates in internal…

Argues that Gottlieb rejects population sampling and statistical analyses of distributions as he proposes that his experimental brand of mechanistic science is the only legitimate approach to developmental research. Maintains that Gottlieb exaggerates developmental uncertainty, based on his own research with extreme environmental manipulations.…

Presents a general class of single-case statistical procedures derived from previously developed nonparametric randomization tests. Designs are illustrated that focus on the general and comparative effectiveness of alternative interventions, multiple units with differentiable characteristics, and multiple outcome measures. Provides operational…

Researchers often have one or more theories or expectations with respect to the outcome of their empirical research. When researchers talk about the expected relations between variables if a certain theory is correct, their statements are often in terms of one or more parameters expected to be larger or smaller than one or more other parameters.…

This quantitative research study used ex post facto data to analyze possible relationships between a discrete set of independent variables and academic achievement among provisionally admitted students at a public, four-year historically black university located in the mid-Atlantic United States. The independent variables were first-generation…

The primary purpose of this study was to assess the impact of the GROW program on the intrinsic, extrinsic, and the general job satisfaction of principals and assistant principals in Pennsylvania. The impact of the variables of year in position, age, gender, level of work, location of school, and present degree was examined; the impact of…

Unionization efforts on community college campuses have increased fivefold over the past decade, this research addressed issues relating to increased levels of faculty unionization on community college campuses in Ohio. The purpose of this quantitative study was to examine and describe what, if any, relationships exist among faculty union…