Identifying the function of behavior is crucial in formulating functionally-based treatment programs for people with challenging behaviors. The Questions About Behavior Function (QABF) is a well-established instrument with sound psychometric properties. The present study describes the development process for a Korean version of the QABF. The…

A top priority in the field of autism spectrum disorders (ASD) is the development of precise early diagnostic tools that can be completed with minimal time and training. We report on the convergent and divergent validity of the Baby and Infant Screen for Children with aUtIsm Traits (BISCUIT), specifically the BISCUIT-Part 1. Previous research with…

Previous studies analyzed the reliability as well as sensitivity and specificity of the Autism Spectrum Disorder-Diagnostic for Children (ASD-DC). This study further examines the psychometric properties of the ASD-DC by assessing whether the ASD-DC has convergent validity against a psychometrically sound observational instrument for Autistic…

Background: This study assessed the psychometrics of two measures--the "Matson Evaluation of Drug Side-effects" (MEDS) and the "Akathisia Ratings of Movement Scale" (ARMS)--and examined the symptom profile of akathisia in a sample of people with intellectual disability (ID). Method: Sixty-six participants formed three groups of…

The assessment of maintaining variables with the goal of developing prosocial intervention plans has become a driving force in the intellectual disabilities (ID) literature. One particularly crucial variable is whether the behavior is low or high rate and whether the challenging behavior is best characterized by self-injury or aggression. Because…

Due to the relative inability of individuals with intellectual disabilities (ID) to provide an accurate and reliable self-report, assessment in this population is more difficult than with individuals in the general population. As a result, assessment procedures must be adjusted to compensate for the relative lack of information that the individual…

Social skills are defining aspects of intellectual disability (ID). Additionally, their presence or absence can be a major impediment to independent living, and they correlate with other problems in the ID population, such as comorbid psychopathology. To date, little has been done to develop scales to measure these problems, particularly for…

This study was designed to establish the initial psychometric properties of the first scale specifically developed for behavior problems of adults with Autism Spectrum Disorders (ASD) and intellectual disability (ID). The Autism Spectrum Disorders-Behavior Problems for Adults (ASD-BPA) consists of 20 items in which raters indicate if each item is…