Aberrant behavior refers to any type of unusual behavior that would not be expected under normal circumstances. In educational and psychological testing, such behaviors have the potential to severely bias the aberrant examinee's test score while also jeopardizing the test scores of countless others. It is therefore crucial that aberrant examinees…

Researchers are often inclined to test agreement or discrepancy hypotheses using difference scores. This commentary explains 2 mathematical-statistical principles underlying associations with difference scores and 2 conceptual-interpretation problems that make difference scores inappropriate for testing such hypotheses. The commentary provides…

The use of differences scores to assess agreement/disagreement has a long and contentious history. Laird (2020) notes, however, that developmentalists have been particularly resistant to discontinue the use of difference scores. One area of developmental science where difference scores are still in regular use is that of parental differential…

Change-point analysis (CPA) is a method for detecting abrupt changes in parameter(s) underlying a sequence of random variables. It has been applied to detect examinees' aberrant test-taking behavior by identifying abrupt test performance change. Previous studies utilized maximum likelihood estimations of ability parameters, focusing on detecting…

For students exhibiting challenging behaviors that are nondangerous to others and nondisruptive to classroom activities, such as daydreaming and doodling, educators are unlikely to refer these students for more individualized and resource-intensive behavioral support. As a step towards understanding how to address these students' motivational…

When results of descriptive functional behavior assessments (FBAs) are inconclusive, experimental analysis methods can be used to directly test hypotheses about when or why a student engages in challenging behavior. Despite growing research on practical variations of hypothesis testing in schools, these methods are rarely incorporated in FBAs in…

There is an urgent need to aid in what will be an ongoing educational recovery in the wake of the COVID-19 pandemic. One avenue for supporting students with and at-risk for emotional and behavioral disorders (e.g., internalizing and externalizing behaviors) is implementation of tiered systems, which emphasize evidence-based practices to prevent…

As part of standards-based reforms, there is increasing emphasis on ensuring that students with moderate intellectual disabilities (ID), including students with Autism Spectrum Disorders (ASD), learn to read. There is also converging evidence that explicit teaching of letter sounds, phonics, and sight words is effective for this population, but…

Despite the early onset of challenging behaviors, there is a lack of research investigating the function of challenging behavior in toddlers with autism spectrum disorder (ASD) and developmental disabilities (DDs). The current study evaluated group differences in the frequency and severity of five functions of challenging behavior (i.e.,…

The use of standardized assessment in evidence-based practice (EBP) is critical in identifying empirically supported interventions (ESIs); however, the subject has received minimal attention in the literature. In a sample of child welfare involved youth, this study sought to determine whether there was a relationship between dimensions of trauma…

When results of descriptive functional behavior assessments (FBAs) are inconclusive, experimental analysis methods can be used to directly test hypotheses about when or why a student engages in challenging behavior. Despite growing research on practical variations of hypothesis testing in schools, these methods are rarely incorporated in FBAs in…

There is a paucity of research in Australia about educators' use of differentiated instruction (DI) to support the learning of students with ADHD. This study reports on a small-scale, qualitative research using interviews with teachers and school leaders to identify how they use DI as an effective teaching instruction for students with ADHD.…

As part of standards-based reforms, there is increasing emphasis on ensuring that students with moderate intellectual disabilities (ID), including students with Autism Spectrum Disorders (ASD), learn to read. There is also converging evidence that explicit teaching of letter sounds, phonics, and sight words is effective for this population, but…

The overall purpose of the research studies described in this report was to investigate the quality of the administration of the Partnership for Assessment of Readiness for College and Careers (PARCC) assessment during its first operational year (2014-2015). Findings from these studies can be used to identify threats to the validity of PARCC test…

Objective: Children with ADHD often experience functional impairments across various aspects of daily life. This study addresses the dearth of longitudinal research on functional impairment trajectories from preschool to school age in children with symptoms of ADHD and comorbid disorders. Methods: We investigated the extent to which functional…