Teacher coaching is a powerful form of professional learning that improves teaching practices and student achievement, yet little is known about the specific aspects of coaching programs that are more effective. Researchers used a blocked randomized experiment to study the effects of one-to-one coaching on teacher practice. When pooled across all…

The majority of studies that have investigated empathic responsiveness of individuals with Autism spectrum disorder (ASD) have used heterogeneous groups in terms of age, cognitive level and gender which significantly impact the results. Our aim in this study was to explore responsiveness of a more homogenous sample of 21 children with ASD and 17…

In a randomized controlled trial (RCT), treatments are assigned randomly and treatments are withheld from participants. Is it ethically permissible to conduct an RCT in a social setting? This paper addresses two conditions for justifying RCTs: that there should be a state of equipoise and that the trial should be scientifically promising.…

From early in development, humans have strong prosocial tendencies. Much research has documented young children's propensity to help others achieve their unfulfilled goals toward physical objects. Yet many of our most common and important goals are social--directed toward other people. Here we demonstrate that children are also inclined, and able,…

As the US continues to diversify, methods for accurately assessing human behavior must evolve. This paper offers multicultural research considerations at several stages of the research process for psychological research and consultation. Implications regarding the comparative research framework are discussed and suggestions are offered on how to…

School refusal and truancy is a community problem that affects individuals, families, and organizations while lacking a universally accepted definition. At-risk youth often exhibit academic failure, and externalized and or internalized problematic behaviors while schools lose funding and families become disconnected. The school setting allows…

Causal prescriptive statements are valued in the social sciences when there is the goal of helping people through interventions. The articles in this special issue cover different methods for testing causal prescriptive statements. This commentary identifies both virtues and liabilities of these different approaches. We argue that it is extremely…

The motivation for this paper is the authors' recent work on several randomized control trials in which they found the primary result, which averaged across subgroups or sites, to be moderated by demographic or site characteristics. They are led to examine a distinction that the Institute of Education Sciences (IES) makes between "confirmatory"…

Background: This article describes the process of including people with intellectual disabilities (ID) and carers of people with ID as researchers and participants in randomised controlled trial (RCT) research. People with ID are rarely involved in research about their health, either as researchers or participants. Carers are often included as…

This paper is directed to researchers who conduct and report education intervention studies. Its purpose is to stimulate and guide them to go a step beyond reporting the statistics that emerge from their analysis of the differences between experimental groups on the respective outcome variables. With what is often very minimal additional effort,…

This paper reports on teachers' use of concept mapping as an alternative assessment strategy in advanced level biology classes and its effects on students' cognitive skills on selected biology concepts. Using a mixed methods approach, the study employed a pre-test/post-test quasi-experimental design involving 156 students and 8 teachers from…

This paper includes a nontechnical description of methods for calculating effect sizes in intellectual and developmental disability studies. Different hypothetical studies are used to illustrate how null hypothesis significance testing (NHST) and effect size findings can result in quite different outcomes and therefore conflicting results. Whereas…

Regression discontinuity designs (RDDs) are considered to be one of the strongest nonexperimental designs available for the purpose of identifying the effects of an intervention. RDD can be used in situations in which assignment to a treatment group is based on a cutoff value on a continuous assignment variable. The impact of the intervention is…

"t"-Tests are widely used by researchers to compare the average values of a numeric outcome between two groups. If there are doubts about the suitability of the data for the requirements of a "t"-test, most notably the distribution being non-normal, the Wilcoxon-Mann-Whitney test may be used instead. However, although often…

The Helping Early Literacy with Practice Strategies (HELPS) Program was developed by integrating 8 evidence-based fluency-building instructional strategies into a structured program that can be feasibly implemented by educators. The HELPS Program has been shown in previous research to significantly improve elementary-aged students' reading…