This study investigated differences in achievement for control groups learning college algebra using traditional classroom instruction methods compared to experimental groups using computer algebra tutorials for three precalculus topics. Two instructors each taught one control group and one experimental group. No significant differences were…

The regression-discontinuity design involving a treatment interaction effect (TIE), pretest-posttest functional form specification, and choice of point-of-estimation of the TIE are examined. Formulas for controlling the magnitude of TIE in simulations can be used for simulating the randomized experimental case where estimation is not at the…

An experimental class in introductory statistics (n=40) using simulation software at American University was compared to a traditionally taught control group (n=36) with respect to achievement and accrued beliefs about the benefits of the simulations. Results indicate significantly higher achievement scores for the experimental class with about…

The epidemiological method of case-control study is described, and its advantages and disadvantages are discussed for use in health program evaluation. Examples are reviewed, with a step-by-step description of the method. Potential applications are discussed, including worksite health promotions, screening programs, and large-scale public health…

The question of memory-based processing when transfer is delayed was addressed for 181 college students in a transfer-for-training paradigm. Results indicate that the use of a general and a specific schema for retrieval when memory-based processing is required to demonstrate transfer in a problem domain. (SLD)

This commentary argues that the study reported in EC 605 442, which indicated long-term gains for children with autism who experienced intensive behavioral intervention as preschoolers, needs to be replicated to be convincing, especially given the problem of nonrandom assignment of experimental and control groups. (JDD)

Reviews research into class size effects from a methodological viewpoint, concentrating on various strengths and weaknesses of randomized controlled trials (RCT) and observational studies. Discusses population definitions, causation, and generally sets out criteria for valid inferences from such studies. Illustrates with new findings from data in…

Examines the acquisition of tense and agreement by L2 learners of French. Interviews were conducted with English-speaking children acquiring French as a second language and with grade-matched native French-speaker controls. Results revealed that items encoding agreement emerged before items encoding tense, suggesting that the abstract grammatical…

Focuses on the importance of phonology in establishing orthographic representations. In normal readers, phonological and orthographic representations of words are so closely connected that they are usually coactivated, whereas in dyslexics, this connection is less strong, so that orthographic representations interfere less with phonemic…

Describes a computer-based instructional system called Stat Lady and reports the results of an evaluation study of undergraduates that tested the efficacy of learning probability from this program compared to a traditional lecture and a no-treatment control group. Aptitude treatment interaction is also investigated. (Author/LRW)

Describes how the University of Pennsylvania is testing a new way of teaching involving team-taught interdisciplinary courses on some its freshmen, while keeping others in a control group. (EV)

The primary purpose of this study was to determine the influence of Career Discovery I, the first module in a computer-assisted program for career decision-making, on the stability of the choice of college majors. This study sought to determine whether any differences existed in the stability of college majors between students who entered a…

In the No Child Left Behind Act and the What Works Clearinghouse, the federal government has attempted to establish guidelines for the type of education research that U.S. schools should consider in selecting instructional programs and resources. The government's clear preference for the medical model--a powerful research design in such fields as…

The notion of item context effects implies that psychometric properties of an item or scale are altered by the presentation format, for example, blocked versus randomized. In an experimental study with high school students, the experimental group (n = 407) answered a four-dimensional academic self-concept questionnaire, in which the items were…

A peer support intervention was developed to support aging caregivers and adults with developmental disabilities in planning for the future. The intervention consisted of a legal/financial training session followed by five additional small-group workshops. Pretest and 1-year follow-up surveys were conducted with 29 families participating in the…