Significant to a latent trait or item response theory analysis of a mental test is the determination of exactly what is being quantified. The following are practical problems to be considered in the formulation of a good theory: (1) deciding whether two tests measure the same trait or traits; (2) analyzing the relative contributions of a pair of…

The one-parameter psychometric model known as the Rasch model is described and examined. The basic principles underlying the model and the concepts of unidimensionality, local stochastic independence, and additivity are explained in non-mathematical terms. The requirements of measurement procedures, the measurement of latent traits, the control on…

A behavioral domain is well-defined when it is clear to both test developers and test users which categories of performance should or should not be considered for potential test items. Only those tests that are keyed to well-defined domains meet the definition of criterion-referenced tests. The greatest proliferation of criterion-referenced tests…

A method is proposed for providing an absolute, in contrast to comparative, evaluation of how well two tests are equated by transforming their raw scores into a particular common scale. The method is direct, not requiring creation of a standard for comparison; expresses its results in scaled rather than raw scores, and allows examination of the…

Thirty French-speaking Quebec preschoolers were administered translated versions of the Developmental Indicators for the Assessment of Learning-Revised (DIAL-R) and the Kaufman Assessment Battery for Children (K-ABC). Discussion focuses on aspects of translation and content requiring further modification, and on issues regarding use of translated…

Notes that significantly different results frequently exist between tests that purport to measure the same skill when the same child is tested on both instruments. Considers discrepancies related to examinee, examiner, examinee-examiner interactions, environment, and psychometric characteristics of the tests employed. Cites 10 major psychometric…

Two approaches, the minimax approach and the Rasch procedure, are described for the simultaneous determination of passing scores for subtests when the passing score for the total test is known. (Author/LMO)

Reports the efforts of the California Assessment Program (CAP) to interject critical thinking items into its new statewide social studies tests. Provides definitions of the critical thinking skills tested by the 8th grade social studies CAP test, and lists 100 critical thinking skills vocabulary words. (JDH)

There is a unity underlying the diversity of models for the analysis of multivariate data. Essentially, they constitute a family of models, most generally nonlinear, for structural/functional relations between variables drawn from a behavior domain. (Author)

Qualitative evidence for the operation of partial knowledge is given by two findings. First, performance when second and subsequent choices are made is above the chance level. Second, it is positively related to first choice performance. A number of theories incorporating partial knowledge are compared quantitatively. (Author/LMO)

An equating design in which two groups of examinees from slightly different populations are administered a different test form with a subset of common items is widely used. This paper presents standard errors and a simulation that verifies the equation for large samples for an equipercentile equating procedure for this design. (Author/BS)

Describes a study which submitted data from a multiple-choice English as a second language reading comprehension test to classical test theory item analysis and latent trait measurement. The purpose was to identify weak items and to compare the number of weak items indicated by the two different approaches. (SED)

The evidence for the psychometric adequacy of behavioral interviews in terms of traditional psychometric theory and generalizability theory are reviewed. The review resulted in the conclusion that behavioral interviews have some evidence for interrater reliability, content validity, and criterion-related validity. Additional research in several…

Four methods are outlined for estimating or approximating from a single test administration the standard error of measurement of number-right test score at specified ability levels or cutting scores. The methods are illustrated and compared on one set of real test data. (Author)

Multiple-choice tests such as the Force Concept Inventory (FCI) provide useful instruments to probe the distribution of student difficulties on a large scale. However, traditional analysis often relies solely on scores (number of students giving the correct answer). This ignores what can be significant and important information: the distribution…