Much of the evidential basis for recent policy decisions is grounded in effect size: the standardised mean difference in outcome scores between a study's intervention and comparison groups. This is interpreted as measuring educational influence, importance or effectiveness of the intervention. This article shows this is a category error at two…

The present study investigated the relationships between socioeconomic status (SES) and word reading in both Chinese (L1) and English (L2), with children's cognitive/linguistic skills considered as mediators and/or moderators. One hundred ninety-nine Chinese kindergarteners in Hong Kong with diverse SES backgrounds participated in this study. SES…

Kenya is investing in information and communication technology (ICT) to improve children's learning outcomes. However, the literature on ICT is pessimistic about the ability of ICT alone to improve outcomes, and few ICT programs have created the instructional change necessary to increase learning. The Primary Math and Reading (PRIMR) Initiative…

Qatar is undergoing major educational reform that is shifting its educational policy toward an instructional orientation grounded in constructivism and student-centered instruction. Differences in cultural conceptions of knowledge acquisition and the purpose of education are examined to highlight challenges to Qatar's reform implementation…

Commentaries regarding appropriate methods for researching professional development have been a frequent topic in recent issues of "Educational Researcher" as well as other venues. In this article, the authors extend this discussion by observing that randomized trials of specific professional development programs have not enhanced our…

Given scarce resources for evaluation, we recommend that education researchers more frequently conduct comprehensive randomized trials that generate evidence on how, why, and under what conditions interventions succeed or fail in producing effects. Recent experience evaluating a randomized need-based financial aid intervention highlights some of…

This study examines whether a school-based preventive intervention for children with aggressive behavior affects children's academic outcomes when it is implemented by school counselors in a dissemination field trial. The Coping Power program targets empirical risk factors for aggressive behavior and focuses primarily on teaching social and…

This paper is concerned with the gap in educational provision for vulnerable learners in Malawi who are at risk of falling behind and dropping out of school due to irregular attendance. It draws on a study in high HIV-prevalence areas that explores the patterns of inequality and disadvantage that disrupt learning and uses this knowledge to design…

Background: In recent years, due to deliberate educational policy in various places around the world, children with dyslexia study in regular classes with non-dyslexic classmates. They do not appear handicapped, because their disabilities do not stem from physical deformities, and therefore, it is not easy to identify them in a group where the…

Using a cluster randomization design, schools were randomly assigned to implement Success for All, a comprehensive reading reform model, or control methods. This article reports final literacy outcomes for a 3-year longitudinal sample of children who participated in the treatment or control condition from kindergarten through second grade and a…

Several evaluations of private school voucher programs in the United States have reported achievement gains for voucher users, particularly African Americans. These studies tend to be structured as Randomized Field Trials (RFTs) in which participants are assigned to treatment (offered a voucher) and control (not offered a voucher) groups by…

Research methods are tools that can be variously applied - depending on the stage of knowledge in a particular area, the type of research question being asked, and the context of the research. The field of program evaluation, critical for social policy development, often has not adequately embraced the full range of methodological tools needed to…

Kidskin was a sun-protection intervention study involving 1776 children attending 33 primary schools in Perth, Western Australia. There were three study groups: a control group, a moderate intervention group and a high intervention group. In addition to receiving a specially designed curricular intervention (1995-1998), the moderate and high…