Background: Communication impairments are a leading concern for parent caregivers of individuals with rare neurodevelopmental disorders (RNDDs). Clinical trials of disease modifying therapies require valid and responsive outcome measures that are relevant to individuals with RNDDs. Identifying and evaluating current psychometric properties for…

Measures of academic engagement and disruptive behavior in students are strong predictors of social, academic, and lifelong career outcomes. Educators need a measurement tool that is feasible, accurate, and cost-effective in order to identify students who may be in need of additional behavioral support. Direct Behavior Ratings (DBRs) offer a…

Behavior analysts frequently use the Verbal Behavior Milestones Assessment and Placement Program (VB-MAPP) to assess the language and social skills of children with autism in everyday practice and in research. Despite the widespread use of the VB-MAPP, its psychometric characteristics have not been extensively investigated. To provide information…

CDKL5 deficiency disorder (CDD) results in early-onset epilepsy and lifelong cognitive and motor impairments. With no validated measure for communication in CDD, this study evaluated the psychometric properties of the Communication and Symbolic Behavior Scales-Developmental Profile Infant Toddler Checklist (CSBS-DP ITC). Caregivers (n = 150;…

Irrational beliefs (IB) are irrational thinking patterns that limit the interpretation of situations and generate difficulties in daily life. Although there are several instruments to evaluate irrational beliefs, attention to their evaluation in adolescents has been insufficient, and possible gender and cultural differences have been overlooked.…

This study analyzed the psychometric properties of a Chinese version of the teacher-reported Devereux Early Childhood Assessment, Second Edition (DECA-P2) using a sample of 246 children aged between 2 and 6 years old. Confirmatory factor analysis was used to examine its construct validity. Reliability was evaluated based on the internal…

Given the dearth of technically adequate universal screening tools in the Greek language, the current study sought to examine the psychometric properties of a 67-item universal screener (i.e. Integrated Teacher Rating Form; ITRF), that was originally developed in American English and then translated and implemented in Greek primary schools. The…