Propensity and prognostic score methods are two statistical techniques used to correct for the selection bias in nonexperimental studies. Recently, the joint use of propensity and prognostic scores (i.e., two-score methods) has been proposed to improve the performance of adjustments using propensity or prognostic scores alone for bias reduction.…

Underlying all What Works Clearinghouse (WWC) products are WWC Study Review Guides, which are intended for use by WWC certified reviewers to assess studies against the WWC evidence standards. As part of an ongoing effort to increase transparency, promote collaboration, and encourage widespread use of the WWC standards, the Institute of Education…

The effectiveness of a peer-mentoring program was examined at a university in California. Previous studies suggest university peer mentoring might increase students' feelings of engagement, which can contribute to their retention. Pretest and posttest data were collected from 304 freshmen (mentored and nonmentored) during the fall of 2012 in a…

This document provides step-by-step instructions on how to complete the Study Review Guide (SRG, Version S3, V2) for single-case designs (SCDs). Reviewers will complete an SRG for every What Works Clearinghouse (WWC) review. A completed SRG should be a reviewer's independent assessment of the study, relative to the criteria specified in the review…

This ex-post-facto quasi-experimental research design was conducted by selecting a convenient sample of approximately 2,000 3rd grade ELLs who took the regular reading and math English STAAR test during the 2014-15 school year in an urban southern Texas school district. This study was conducted using a quantitative research method of data…

The present article considers a fundamental question in evaluation research: "By how much do program effects vary across sites?" The article first presents a theoretical model of cross-site impact variation and a related estimation model with a random treatment coefficient and fixed site-specific intercepts. This approach eliminates…

The results of previous research on the "Language for Learning" programme suggest that it produces positive effects on the intellectual, language, and social skills of young children with and without disabilities [Benner, G. J., Trout, A., Nordness, P. N., Nelson, J. R., Knobel, M. L., Epstein, A.,…Epstein, M. H. (2002). "The…

Purpose: Chinese people generally lack knowledge of mental illness. Such phenomenon may lead to a delay in seeking psychiatric treatments. This study evaluated the effectiveness of Mental Health First Aid (MHFA) program in improving mental health knowledge of the general public in Hong Kong. Methods: A quasi-experimental design was adopted whereby…

The general practice of civil servant training providers in Hungary is to evaluate their products only through surveying the reaction of participants. The obvious weakness of this practice is that the variance in the level of satisfaction does not necessarily coincide with the positive professional impact that the trainings are aimed to produce.…

We used a comparative interrupted time series design to examine the impact of the Massachusetts' Wraparound Zone Initiative on student achievement, attendance, retention, and suspension. This initiative was designed to create coordinated district systems that allow schools to proactively and systematically address students' nonacademic needs. The…

This paper presents a quasi-experimental evaluation of a required, teaching-focused, new faculty program at a large research university. The study makes use of institutional data, including student evaluations of teaching and faculty participation in educational development activities, which are available on many campuses yet rarely used in…

Students who struggle to read on grade level by the end of third grade are less likely to make academic progress and graduate before the age of 19. The district leaders in a suburban district in Texas were interested in determining the root cause of stagnant reading standardized test scores. After determining the root cause, a lack of a…

Objective: Suicide remains a pressing issue for college communities. Consequently, gatekeeper trainings are often provided for staff. This study examines the effect of one such program, Applied Suicide Intervention Skills Training (ASIST). Participants: 51 college employees received ASIST in August of 2014 and were compared to 30 wait-list control…

Background: Time management and job satisfaction all related to each other and greatly affect success of organization. Subjects and Methods: The study aimed to evaluate the efficacy of a designed program of time management on job satisfaction for head nurses. A Quasi-experimental design was used for a total number of head nurses participated. Two…

The article evaluates a Czech environmental education program focused on developing competence in issue investigation. In the evaluation, a simple quasi-experimental design with experimental (N = 200) and control groups was used. The results suggest that the program had a greater impact on girls than on boys, and that it increased their internal…