I discuss three common practices that obfuscate or invalidate the statistical analysis of randomized controlled interventions in applied linguistics. These are (a) checking whether randomization produced groups that are balanced on a number of possibly relevant covariates, (b) using repeated measures ANOVA to analyze pretest-posttest designs, and…

The focus of this article is two-fold. First, it describes a model that can be used to guide the evaluation of teacher professional development. The model combines important components of existing models and incorporates the use of students' perceptions for examining teacher change. Second, the article reports the evaluation of a teacher…

This article, written by Assistant Professor Noel Chia from the National Institute of Education, Nanyang Technological University, Singapore and Professor Stephen Houghton from the Centre for Child and Adolescent Related Disorders, University of Western Australia, reports an empirical evaluation of a one-year Orton-Gillingham instruction based…

This paper brings together the findings of a series of studies that explored the impact of curricular changes on students' approaches to learning. The findings, which were initially surprising, are confirmed by the identification of similar patterns across four different medical educational programmes within Australia and Sri Lanka. The four…

Thirty-seven students from a suburban community in the southern United States were randomly assigned to receive 30 minutes of additional instruction each day in their usual language arts curriculum or 30 minutes of instruction with the Direct Instruction program, "Funnix Beginning Reading". Instruction for the "Funnix" group…

This study explored outcomes in a constructivist career course. Using a pretest-posttest design, the authors assessed the empowerment (operationalized as career decision self-efficacy) and career indecision of 82 culturally diverse college students at a large, midwestern university. Data were analyzed using a multivariate analysis of variance.…

Clients' self concepts and dissociative experiences were examined to determine the impact of an Adlerian based pretrial diversion program. Clients completing the program displayed a significant change in self concepts and dissociative experiences. A repeated measures multivariate analysis of variance indicated a 35% change, made up of the…

This study assessed the dispositional gratitude and its relationships with orientations to happiness and burnout in a sample of 96 Chinese school teachers in Hong Kong and investigated the effectiveness of an eight-week gratitude intervention programme using a pre-test/post-test design with outcome measures of subjective well-being in the same…

Vocabulary knowledge at school entry is a robust predictor of later reading achievement. Many children begin formal reading instruction at a significant disadvantage due to low levels of vocabulary. Until recently, relatively few research studies examined the efficacy of vocabulary interventions for children in the early primary grades (e.g.,…

This report examines theoretical and empirical issues related to the statistical power of impact estimates under clustered regression discontinuity (RD) designs. The theory is grounded in the causal inference and HLM modeling literature, and the empirical work focuses on commonly-used designs in education research to test intervention effects on…

The purpose of this article is twofold: (a) to describe a unique teacher licensure program for grades 7-12 that integrates mathematics, science, and technology education and (b) to explore the attitudes and perceptions related to the integration of mathematics, science, and technology education of three cohorts of preservice teachers enrolled in…

This study investigated the effectiveness of 5E learning cycle on 6th-grade students' achievement of cell concepts, and their scientific epistemological beliefs. Epistemological Belief Questionnaire and the Cell Concept Test were administered as pre-test and post-test to a total of 153 sixth grade students in four intact classes of an elementary…

Cluster analysis of 139 partner violent men's self-reports on the State-Trait Anger Expression Inventory identified profiles reflecting pathological anger (PA), low anger control (LAC), and normal anger (NA). The PA group self-reported higher pretreatment partner abuse, interpersonal dysfunction, distress, and substance abuse and had lower…

This study examined the effect of improvements in timing/rhythmicity on students' reading achievement. 86 participants completed pre- and post-test measures of reading achievement (i.e., Woodcock-Johnson III, Comprehensive Test of Phonological Processing, Test of Word Reading Efficiency, and Test of Silent Word Reading Fluency). Students in the…

This study investigated the effects of gameplaying on fifth-graders' maths performance and attitudes. One hundred twenty five fifth graders were recruited and assigned to a cooperative Teams-Games-Tournament (TGT), interpersonal competitive or no gameplaying condition. A state standards-based maths exam and an inventory on attitudes towards maths…