Autistic people are more likely to have co-occurring mental health conditions compared to the general population, and mental health interventions have been identified as a top research priority by autistic people and the wider autism community. Autistic adults have also communicated that quality of life is the outcome that matters most to them in…

Unfolding item response theory (IRT) models are important alternatives to dominance IRT models in describing the response processes on self-report tests. Their usage is common in personality measures, since they indicate potential differentiations in test score interpretation. This paper aims to gain a better insight into the structure of trait…

Background: Published best-practice guidelines and standardized protocols for voice assessment recommend multidisciplinary evaluation utilizing a comprehensive range of clinical measures. Previous studies report variations in assessment practices when compared with these guidelines. Aims: To provide an up-to-date evaluation of current global…

Background: The Six-Minute Walk Test (6MWT) has been used with clinical and healthy populations to assess functional capacity and cardiovascular fitness. The aim of this study was to determine the test-retest reliability of a modified-6MWT as well as concurrent validity of walk distance with peak oxygen uptake (VO[subscript 2] peak). Method:…

This study evaluated the potential of using the Supports Intensity Scale (SIS) for resource allocation for people with intellectual disabilities (ID) in Taiwan. SIS scores were compared with those obtained from three tools that are currently used in Taiwan for homecare services: the medical diagnosis issued by local authorities and two scales…

Aims: Childhood attention-deficit/hyperactivity disorder (ADHD) frequently persists into adulthood and continues to impair health-related quality of life (HRQL). Thus, it is important to have validated symptom and HRQL measures for assessing treatment outcomes in this population. The purpose of the current analysis was to assess test-retest…

Background: In the last decades several instruments measuring anxiety in adults with intellectual disabilities have been developed. Aim: To give an overview of the characteristics and psychometric properties of self-report and informant-report instruments measuring anxiety in this group. Method: Systematic review of the literature. Results:…

Despite substantial research use, measures of the five-factor model (FFM) are infrequently used in clinical settings due, in part, to issues related to administration time and a reluctance to use self-report instruments. The current study examines the reliability and validity of the Five-Factor Model Score Sheet (FFMSS), which is a 30-item…

Evaluating pain in adults with intellectual and developmental disability (IDD) is a challenge. The Non-Communicating Adults Pain Checklist (NCAPC) was recently developed from the Non-Communicating Children's Pain Checklist (NCCPC) and examined in a group of adults with IDD (N = 228) and found to hold satisfactory construct validity, internal…

Objectives: Establish metric properties of the Neighborhood Inventory for Environmental Typology (NIfETy). Method: A total of 919 residential block faces were assessed by paired raters using the NIfETy. Reliability was evaluated via interrater and internal consistency reliability; validity by comparing NIfETy data with youth self-reported…

Background: The "Questions About Behavioral Function" (QABF) correctly identifies maintaining variables of challenging behaviour. However, for adults who have a long history of challenging behaviours, identifying one clear function of the maladaptive behaviour is difficult. Additionally, the person may develop multiple functions of their…

This paper describes the development of the interRAI-Intellectual Disability (interRAI ID), a comprehensive instrument that assesses all key domains of interest to service providers relative to a person with an intellectual disability (ID). The authors report on the reliability and validity of embedded scales for cognition, self-care, aggression,…

The underlying structure of the Postconcussion Syndrome Questionnaire (PCS) was evaluated in a large sample of 1,116 medical and psychiatric patients. Balancing internal consistency, confirmatory factor analysis, and parsimony results in endorsement of the four-factor solution for the PCS for this sample. (SLD)

In this study, self-reports of 34 individuals with developmental disabilities (DD) were compared with proxy ratings from family and providers. Correlations between the ratings of individuals with DD and the proxy raters were low, as were the correlations between family members and providers. In all scales except "cognition," the individual with DD…

This study describes the development of the Active Treatment Client Rights checklist (ATCR), which was designed to facilitate the assessment, monitoring, and implementation of readily observable client active treatment services for adults with developmental disabilities. The ATCR was found to be highly reliable, valid, and useful in enhancing…