Focuses on regression effects that arise from measurement error, and examines methods used to evaluate pre- to post-therapy score changes that attempt to take these regression effects into account. Discusses statistical and practical problems, identifies and analyzes specific examples, and distinguishes objectives of these methods from other…

Discusses the basic concepts of testing and item development and the application of alternative assessments to information literacy content for library instruction. Topics include reliability; validity; statistical analysis; selected response, including checklists, rank order, or simple match; constructed response; essays; and complex assessments.…

Statistical analysis tools in language testing are described, chiefly classical test theory and item response theory. Computer software for statistical analysis is briefly reviewed and divided into three tiers: commonly available; statistical packages; and specialty software. (Author/VWL)

Analysis of continuous variables sometimes proceeds by selecting individuals on the basis of extreme scores of a sample distribution and submitting only those extreme scores to further analysis. This sampling method is known as the extreme groups approach (EGA). EGA is often used to achieve greater statistical power in subsequent hypothesis tests.…

Two survey instruments were developed and validated to measure early childhood teachers' (1) knowledge of early mathematical development and (2) beliefs about mathematics teaching and learning in the preschool classroom. The Knowledge of Mathematical Development (KMD) Survey was designed to measure teachers' knowledge of mathematical development…

e mean length of utterance in the Sentence Repetition Task grew from approximately two to three words, and the number of omissions of articles, prepositions and modifiers significantly decreased. After 3;0 years old, omissions of free function words practically disappeared. The results of Study 2 showed that mean length of utterance, omission of…

The objectives of this study were to: (a) determine if very young children will wear an accelerometer for relatively long periods of time and comply with the protocol for its use; (b) evaluate how well a caregiver can estimate the activity level of his/her infant or toddler when completing an exposure-oriented time activity diary; and (c) compare…

Two methods of 'equating' tests using item response theory (IRT) are compared, one using true scores, the other using the estimated distribution of observed scores. On the data studied, they yield almost indistinguishable results. This is a reassuring result for users of IRT equating methods. (Author)

A detailed description is provided of the variable school's demographic setting (DB), which is part of the analysis in phase I of the Evaluation of Practices in Individualized Schooling. The variable is defined; the questionnaires on which the variable is based are listed; the procedures used to scale the variable are explained; the distribution…

To make training cost-effective for its small systems customers, Digital Equipment Corporation provides self-paced training packages for several years that can be used by its customers on-site. To control the quality of this training, Digital is now incorporating computer managed instruction (CMI) into some of these packages. This CMI component…

In large-scale surveys, it is no longer uncommon for repeated measurements to be obtained from respondents and analyses performed to gauge the magnitiude of nonsampling errors. This is particularly true for periodic surveys and longitudinal surveys where a very large investment in data collection is made. This technical note, aimed at the analysis…

This paper describes generalizability theory as an extension to the analysis of variance approach to reliability which allows the researcher to attribute variation to multiple sources, and a number of reliability coefficients to be calculated for most observational contexts. The applications of generalizability coefficients to characterize the…

This volume discusses the conceptualization and measurement of the health status of children (0 to 13 years of age) in terms of physical, mental, and social health and general health perceptions. The discussion is based on Health Insurance Study (HIS) questionnaire data collected from a sample of 8000 people (enrolled in one of the HIS insurance…

The primary purpose of this research is to determine if there exists covert confounding in student perceptionnaires which significantly affect instructors ratings. Eight calculus classes were randomly selected. Each student completed a Texas A & M University (TAMU) student perceptionnaire the first day of class, envisioning having completed the…