Mediation analysis is an important statistical tool in many research fields, where the joint significance test is widely utilized for examining mediation effects. Nevertheless, the limitation of this mediation testing method stems from its conservative Type I error, which reduces its statistical power and imposes certain constraints on its…

In health technology assessment, matching-adjusted indirect comparison (MAIC) is the most common method for pairwise comparisons that control for imbalances in baseline characteristics across trials. One of the primary challenges in MAIC is the need to properly account for the additional uncertainty introduced by the matching process. Limited…

Body mass index (BMI) is increasingly recognized as an inadequate measure for determining obesity in children. Therefore, the aim within this study was to investigate other indirect methods of body fat assessment that could potentially be used in place of BMI. Twenty-four children (boys: 13.8 [plus or minus] 0.8 yr; girls: 13.3 [plus or minus] 0.5…

A method is presented for generalized canonical correlation analysis of two or more matrices with missing rows. The method is a combination of Carroll's (1968) method and the missing data approach of the OVERALS technique (Van der Burg, 1988). In a simulation study we assess the performance of the method and compare it to an existing procedure…

A Monte Carlo study examined the statistical performance of single sample and bootstrap methods that can be used to test and form confidence interval estimates of indirect effects in two cluster randomized experimental designs. The designs were similar in that they featured random assignment of clusters to one of two treatment conditions and…

This research aimed at developing a methodological framework to investigate the alignment of the Lebanese national math exam tests with the curriculum at the middle school level, during the transitory period of a major curricular reform. The focus is on exploring the characteristics of an "assessment culture" set by the national exams…

This study of seventh-grade girls replicated a 1975 Blatt and Kohlberg study. Experimental subjects received a ten-week moral education program; controls discussed nonmoral issues in English class. Results indicated that the moral education program, even in this brief time period, increased moral judgment. (Author/SJL)

The article presents a theoretical framework for evaluating the utility of consumer product testing methods involving four factors which determine a method's utility, validity, reliability, manageability, and essentiality. The framework is applied to three situations, including comparative evaluation of test methods, comparative product testing,…

Several methods for estimating item response theory scores for multiple subtests were compared. These methods included two multidimensional item response theory models: a bi-factor model where each subtest was a composite score based on the primary trait measured by the set of tests and a secondary trait measured by the individual subtest, and a…

This study presents the random-effects rating scale model (RE-RSM) which takes into account randomness in the thresholds over persons by treating them as random-effects and adding a random variable for each threshold in the rating scale model (RSM) (Andrich, 1978). The RE-RSM turns out to be a special case of the multidimensional random…

The response to intervention (RTI) of English language learners identified as at risk for reading difficulties in the fall of first grade was examined at the end of first grade and at the end of second grade. Students at risk for reading problems were randomly assigned to intervention or control groups. Intervention students received supplemental…

In this study, 590 third graders from 12 Dutch schools took 32 tests indicating 16 semantic Structure-of-Intellect (SI) abilities and 1 of 4 reading comprehension tests, involving either multiple-choice or open-ended items. Results indicate that item type for reading comprehension is congeneric with respect to SI abilities measured. (TJH)

This study seeks to determine whether item features are related to observed differences in item difficulty (DIF) between computer- and paper-based test delivery media. Examinees responded to 60 quantitative items similar to those found on the GRE general test in either a computer-based or paper-based medium. Thirty-eight percent of the items were…

The study was designed to test the effectiveness of three media approaches in presenting home economics career information to students. Taped interviews with three home economists in the fields of food service, child care, and fabric and fashion served as the basis for developing the presentations: (1) a tape recording, (2) tape-slide…

The transition from paper-based to computer-based assessment raises a number of important issues about how mode might affect children's performance and question answering strategies. In this project 104 eleven-year-olds were given two sets of matched mathematics questions, one set on-line and the other on paper. Facility values were analyzed to…