Found that in an introductory biology course at the University of Massachusetts Amherst, adoption of the Data Aggregation Project (free software that allows students in a course to aggregate a large body of data for some particular problem) resulted in an increase in the number of data points students analyzed per semester by a factor of almost…

Notes two faulty aspects of the Reznick et al., twin study (PS 526 688): the expressive language measure at 14 months, which has practically no spread of item difficulty, as well as measures included to assess specific cognitive characteristics; and the notion of infant transition as it affects interpretation of the results. (HTH)

A meta-analysis combining expert evaluation with naturalistic case study methods indicates that such investigations must use special methods to render evaluative judgments of worth. It is demonstrated that descriptive, interpretive, and evaluative aspects of such a study must be combined to yield justifiable conclusions. (TJH)

Canonical weights and structure correlations are used to construct low dimensional views of the relationships between two sets of variables. These views, in the form of biplots, display familiar statistics: correlations between pairs of variables, and regression coefficients. (SLD)

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…

Questions the adequacy with which the giftedness construct is defined in applied educational settings, and the adequacy of the validation data available for these gifted identification procedures. (Author/BJV)

One hundred thirteen elementary students were tested using four standardized instruments; their teachers rated each student on eight bipolar constructs and predicted scores. Results indicate that students who are perceived positively receive higher score predictions, even when academic competence is controlled. Boys seemed to be especially subject…

The entire thesis of "The Bell Curve" disintegrates due to biased use of data, misrepresentations, and logical inconsistencies. Five basic flaws are: inferring causality from correlation, use of dubious racial categories, contradictory arguments concerning the immutability of cognitive ability and the relative contributions of heredity…

Comments on some methodological limitations of the research base of "The Bell Curve": blind use of the normal distribution (bell curve); avoidance of nonnormal statistical distributions, which are more appropriate for some social and economic characteristics; copious use of percentiles and quintiles, inappropriate with nonnormal…

Excoriates Gerald Bracey's "broadsides" against the author's own article in same "Educational Leadership" issue for misinterpreting his conclusions and methodology. Stevenson's learning gap results did not oversimplify ability-effort relationship in U.S. and Asian students; results were similar for U.S. cities with both large…

Demonstrates that conclusions drawn from statistics concerning racial disparities in income, infant mortality, sports participation, and other areas may be partly or wholly wrong, because disparities generally increase as conditions improve. Observes that flawed uses of statistics abound; points out some common errors in interpretation. (DM)

Questioned Straus and Gelles' (1986) conclusion that child and wife abuse were substantially lower in 1985 than in 1975. Refined cohort analysis to apply to data, demonstrating that changes in age structures of adult and child population explained most of reported reduction. Much remaining change may have resulted when respondents' reactions to…

This study examined the impact on school personnel of a psychological report purported to have been authored by a computer-based test interpretation system versus a psychologist. Identical reports were rated in terms of perceived quality, credibility, and interpretation. No effect on subjects' appraisal of the reports based on authorship was…

Explains a model that can be used for debriefing after a highly interactive training activity such as role playing or simulation games. Elements of the model include (1) general decompression; (2) factual information from the activity; (3) inferences; (4) transfer, i.e., from the activity to real world situations; (5) generalizations; and (6)…

Discusses use of data for determining institutional effectiveness; identifies availability of national programs for student outcomes data collection, need for better qualitative and quantitative data, and influence of data on decision making. Review problems related to reporting data and using them in decision-making process. Concludes with…