Single-case research design is a useful methodology for evaluating the presence of a functional relation between an intervention and the mathematical performance of students with a learning disability. However, a functional relation cannot be established with threats to internal validity of the design. External validity is impacted if researchers…

This paper extends the use of Generalizability Theory to the measurement of extemporaneous L2 speech through the lens of speech perception. Using six datasets of previous studies, it reports on "G studies"--a method of breaking down measurement variance--and "D studies"--a predictive study of the impact on reliability when…

The aim of this study is to analyse the importance of the number of raters and compare the results obtained by techniques based on Classical Test Theory (CTT) and Generalizability (G) Theory. The Kappa and Krippendorff alpha techniques based on CTT were used to determine the inter-rater reliability. In this descriptive research data consists of…

Effective classroom management is critical for student and teacher success. Because teachers receive limited preservice preparation and in-service support in classroom management, educational leaders (e.g., school psychologists, behavior coaches, mentor teachers, and administrators) need efficient and effective tools to identify teachers'…

Scoring language learners' speaking skills is open to a number of measurement errors since raters' personal judgements could involve in the process. Different grading designs in which raters score a student's whole speaking skills or a specific dimension of the speaking performance could be settled to control and minimize the amount of the error…

Assessment of clinical competence is complex and inference based. Trustworthy and defensible assessment processes must have favourable evidence of validity, particularly where decisions are considered high stakes. We aimed to organize, collect and interpret validity evidence for a high stakes simulation based assessment strategy for certifying…

English learners (ELs) with reading disabilities (RDs) have been among the lowest performers on academic achievement tests that assess vocabulary. To meet academic demands and prepare for college or careers, ELs with RDs clearly need support in terms of vocabulary acquisition; however, relevant research is scarce. This study investigated the…

Intervention with children with speech and language difficulties has been proven beneficial compared with no treatment yet, knowing what type of intervention to provide remains a challenge. Studies of English-speaking children indicate that intervention targeting the production of morphological targets may have a positive effect on phonological…

Classroom observations are an integral component of teacher evaluation systems, but little is known about who is best qualified to observe and evaluate special educators, who have a specialized skillset, and whether observation instruments adequately reflect their instructional practices. In this study, 19 special education teachers in California…

Deficits in social communication and interaction have been identified as distinguishing impairments for individuals with an autism spectrum disorder (ASD). As a pivotal skill, the successful development of social communication and interaction in individuals with ASD is a lifelong objective. Point-of-view video modeling (VM) has the potential to…

Dressing skill is one of the necessary self-care skills that is taught to individuals with autism in order for them to be able to live independently. Typically, developing individuals can acquire dressing skill on their own; however, children with autism have difficulties in learning such skill without systematic teaching. Thus, teaching dressing…

Common estimators of interrater reliability include Pearson product-moment correlation coefficients, Spearman rank-order correlations, and the generalizability coefficient. The purpose of this study was to examine the accuracy of estimators of interrater reliability when varying the true reliability, number of scale categories, and number of…

Data derived from universal screening procedures are increasingly utilized by schools to identify and provide additional support to students at risk for behavioral and emotional concerns. As screening has the potential to be resource intensive, effort has been placed on the development of efficient screening procedures, including brief behavior…

During family style dining (FSD), caregivers are encouraged to sit with children at the table to support, promote, and facilitate conversations. FSD is considered a best practice in child care and is encouraged by many early childhood agencies. However, there is no current research documenting the effects of FSD on mealtime interactions in the…

In order to construct and evaluate the validity argument for the Objective Structured Assessment of Technical Skills (OSATS), based on Kane's framework, we conducted a systematic review. We searched MEDLINE, EMBASE, CINAHL, PsycINFO, ERIC, Web of Science, Scopus, and selected reference lists through February 2013. Working in duplicate, we selected…