The Present Article describes the effectiveness of stress management classes in decreasing perceived stress among Deaf adults. Deaf adults may experience unique stressors, in addition to circumstances associated with increased stress in the general population. The Perceived Stress Scale (S. Cohen, Kamarck, & Mermelstein, 1983) was used as a…

A subcategory of computer-assisted instruction (CAI), games have additional attributes such as motivation, reward, interactivity, score, and challenge. This study used a quasi-experimental design to determine if previous findings generalize to non simulation-based game designs. Researchers observed significant improvement in the overall population…

D. B. Rubin's model for causal inference in experiments and observational studies is enlarged to analyze the problem of "causes causing causes" and is compared to path analysis and recursive structural equations models. A special quasiexperimental design, the encouragement design, is used to give concreteness to the discussion by…

This paper discusses four criteria for selecting covariates when utilizing the analysis of covariance in quasiexperimental research: completeness, causation, independence, and fallibility. Completeness is the extent to which the known or suspected sources of bias are accounted for by covariates used in an experiment. Causation is the requirement…

The primary purpose of the present study was to investigate the appropriateness of several tests of significance for use with interrupted time series data. The second purpose was to determine what effect the violation of the assumption of uncorrelated error would have on the three tests of significance. The three tests were the Mood test,…

Modeling the process by which participants are selected into groups, rather than adjusting for preexisting group differences, provides the basis for several new approaches to the analysis of data from nonrandomized studies. Econometric approaches, the propensity scores approach, and the relative assignment variable approach to the modeling of…

Selectivity problems are discussed in terms of a general model that is estimated by the maximum likelihood method. Both single-group and multiple-group analyses are considered. An extension of the general model to latent variable models is discussed. (Author/PN)

The effect size was calculated for 104 dependent variables studied in 23 experimental or quasi-experimental evaluations of patient education programs. The mean effect size for all 23 studies indicated that the average taught patient moved from the 50th to the 77th percentile, relative to the control group. (GDC)

According to two small experimental studies of flexible working hours, federal workers with young children choose to arrive at and depart from work earlier, allowing them to increase the time spent with their families and to engage in recreational, educational, and household activities. (Author/SK)

Selection bias can be the most important threat to internal validity in intervention research, but is often insufficiently recognized and controlled. The bias is illustrated in research on parental interventions (punishment, homework assistance); medical interventions (hospitalization); and psychological interventions for suicide risk, sex…

Since the passage of the first Charter School Law in Minnesota in 2001, there have been many studies that have examined the effect of Charter schools on student achievement with very mixed results. The Missouri legislature passed legislation in 1998 permitting the establishment of charter schools in a metropolitan school district or in an urban…

The effectiveness of Tennessee EdTech Launch (TnETL), a statewide technology program designed to meet the No Child Left Behind (NCLB) mandate, was investigated in this matched treatment-control quasi-experimental study. The goal of the program was to provide full-time, on-site technology coaches to prepare teachers to create lessons that engage…

This quasiexperimental research studies the effect of socioeconomic status (SES), language learning, and culture on gifted Hispanic children's performance in an alternative developmental scale (Qualitative Use of English and Spanish Tasks) of cognitive ability for generating developmental profiles. Results show the effect of SES and language…

Purpose: This study concerns one component of the ability to provide person-centered care: the cognitive skill of perceiving others in relatively complex terms. This study tested the effectiveness of a social motivation for increasing the number of psychological constructs used to describe an unfamiliar senior citizen. Design and Methods:…

The aim of this study is to design and develop a Physically Interactive Learning Environment, the PILE system, by integrating video-capture virtual reality technology into a classroom. The system is designed for elementary school level English classes where students can interact with the system through physical movements. The system is designed to…