Bayesian methods seem a natural choice for combining sources of evidence in meta-analyses. However, in practice, their sensitivity to the choice of prior distribution is much less attractive, particularly for parameters describing heterogeneity. A recent non-Bayesian approach to fixed-effects meta-analysis provides novel ways to think about…

It is common to include multiple dependent variables (DVs) in single-case experimental design (SCED) meta-analyses. However, statistical issues associated with multiple DVs in the multilevel modeling approach (i.e., possible dependency of error, heterogeneous treatment effects, and heterogeneous error structures) have not been fully investigated.…

A growing body of research has examined the relationship between family socioeconomic status (SES) and educational outcomes. Meta-analyses of raw correlations generally indicate moderate associations, typically between 0.12 and 0.3 for academic achievement and around 0.18 to 0.4 for educational attainment. Causal inference studies, aimed at…

This systematic review aims to synthesize the literature on the effects of cross-linguistic transfer on Spanish/English bilinguals' reading comprehension skills. The search yielded at least 90 studies in which participants were Spanish/English bilinguals aged birth to Grade 12. Researchers assessed participants' decoding and/or linguistic…

Purpose: The aim of this review is to illuminate the connection between inferential skills and spoken language idiom comprehension (SLIC) with a focus on autism. Idioms are frequently occurring figurative expressions, such as feeling blue, on cloud nine, and all tied up, that have literal and nonliteral meanings. Method: In this review article, an…

Prior reviews of evidence for the impact of formative assessment on student achievement suggest widely different estimates of formative assessment's effectiveness, ranging from 0.40 and 0.70 standard deviations in one review. The purpose of this study is to describe variability in the effectiveness of formative assessment for promoting student…

Within the context of a mathematics reform effort to implement algebra in elementary schools, there is a pressure to provide results in the form of student achievement scores. However, widely-used measures of student achievement may be unrelated to the ideas and instructional practices encouraged by the reform effort. The inappropriate use of…

This working paper contains the overheads used in a seminar designed to introduce some basic concepts of statistics to nonstatisticians. The seminar has been presented on several occasions. The first part of the seminar, and the first set of overheads, deals with the essentials of statistics, including: (1) population, sample, and inference; (2)…

The importance of instructing gifted students in correlational reasoning is emphasized, with attention to what the skill involves and why it is difficult to learn; effective teaching strategies; and successful programs in whole-class, cooperative-learning, and computer formats. Implications in programming for gifted students are discussed. (SW)

The Stability of Self Scale has been used to infer the stability of self-concept from responses collected on a single occasion. Using the large, nationally representative Youth in Transition data for 10th grade boys in public high schools in 1966, Stability of Self responses were related to the variability in self-esteem responses collected in 4…