Outlines four limitations inherent in using a minimum competency test to determine eligibility for a high school diploma and, in some jurisdictions, to determine advance to the next grade. Discusses the appropriate uses of testing in an overall program.(MP)

Studied the effects of experience in administration and scoring of the Wechsler Intelligence Scale for Children (Revised) on types of examiner errors. Results showed total score and administrative error rates dropped significantly with experience and feedback, but response scoring errors, mathematical errors, and IQ errors were not reduced…

Presents the results of a study on data collection instruments, specifically questionnaires, used by libraries in evaluating resource use and institutional effectiveness. A number of causes for inconsistent survey results are identified and problems with imprecision in survey question terminology are discussed. (JL)

Lord's, Millman's and Saupe's methods of approximating the standard error of measurement are reviewed. Through an empirical demonstration involving 200 university classroom tests, all three approximations are shown to be biased. (Author/JKS)

Two estimation procedures for the Rasch Model of test analysis are reviewed in detail, particularly with respect to new developments that make the more statistically rigorous conditional maximum likelihood estimation practical for use with longish tests. (Author/JKS)

In two treatment-repeated measurements designs, the ratio between the unbiased variance of the differences and twice the variance of the errors of measurement can be used to test for interaction of subjects and treatments. The use of this statistic is illustrated. (Author/CP)

Multiple-choice tests composed entirely of two-, three-, or four-choice items were investigated. Results indicated that number of alternatives per item was inversely related to item difficulty, but directly related to item discrimination. Reliability and standard error of measurement of three-choice item tests was equivalent or superior.…

Test-retest correlations can lead to biased reliability estimates when there is instability of true scores and/or when measurement errors are correlated. Using three administrations of the Test of Standard Written English and essay ratings, an analysis is demonstrated which separates true score instability and correlated errors. (Author/BW)

This paper elaborates on the work of Cardinet, and others, by clarifying some points regarding calculations, specifically with reference to existing computer programs, and by presenting illustrative examples of the calculation and interpretation of several generalizability coefficients from a complex six-facet (factor) design. (Author/RL)

Explains the use of the construct representation and inference functions of indicators used in construct measurements of self-concept. Illustrates validity and reliability issues with data from 2,114 12th-grade vocational-technical students. (SK)

Two longitudinal studies examined patterns of reading disability in children. Results indicated that remission of reading disability was relatively common with up to 37% of reading-disabled children showing remission within a 2-year period. Results suggest that the presence of measurement errors may lead to misleading impression of the rate of…

A microcomputer program that computes statistical power for analyses performed by multiple regression/correlation is described. The program features a spreadsheet-like interface, outputting the effect size and value of power corresponding to the input parameters, including predictor variables, sample size, alpha, and error type. (TJH)

Described is the derivation of the relationship between the pH measurement error and the resulting percentage error in hydrogen ion concentration including the use of variable activity coefficients. The relative influence of the ionic strength of the solution on the percentage error is shown. (CW)

Functional and structural relationship alternatives to the standard "F"-test for analysis of covariance (ANCOVA) are discussed for cases when the covariate is measured with error. An approximate statistical test based on the functional relationship approach is preferred on the basis of Monte Carlo simulation results. (SLD)

It has been proposed that the Objective Measure of Ego Identity Status and its scoring criteria should be adjusted to utilize a half standard deviation cutoff. Evidence is provided to support the claim that less stringent criteria will lead to higher numbers classified while arriving at the same research results. This proposal is considered and,…