Social and Behavioral Sciences Commons^™

The Autism Symptom Dimensions Questionnaire: Development And Psychometric Evaluation Of A New, Open-Source Measure Of Autism Symptomatology, Thomas Frazier, Anastasia Dimitropoulos, Leonard Abbeduto, Melissa Armstrong-Brine, Shanna Kralovic, Andy Shih, Antonio Y. Hardan, Eric A. Youngstrom, Mirko Uljarević

2023 Faculty Bibliography

Aim: To describe the development and initial psychometric evaluation of a new, freely available measure, the Autism Symptom Dimensions Questionnaire (ASDQ).

Method: After development and revision of an initial 33-item version, informants completed a revised 39-item version of the ASDQ on 1467 children and adolescents (aged 2-17 years), including 104 with autism spectrum disorder (ASD).

Results: The initial 33-item version of the ASDQ had good reliability and construct validity. However, only four specific symptom factors were identified, potentially due to an insufficient number of items. Factor analyses of the expanded instrument identified a general ASD factor and nine specific symptom …

Profiles Of Circumscribed Interests In Autistic Youth, Emily Spackman, Luke D. Smillie, Thomas Frazier, Antonio Y. Hardan, Gail A. Alvarez, Andrew Whitehouse, Mirko Uljarević

2023 Faculty Bibliography

Circumscribed interests (CI) encompass a range of different interests and related behaviors that can be characterized by either a high intensity but otherwise usual topic [referred to as restricted interests (RI)] or by a focus on topics that are not salient outside of autism [referred to as unusual interests (UI)]. Previous research has suggested that there is pronounced variability across individuals in terms of the endorsement of different interests, however, this variability has not been quantified using formal subtyping approaches. Therefore, using Latent Profile Analysis in a sample of 1,892 autistic youth (Mage = 10.82, SDage = 4.14; 420 females), …