Original Paper

Journal of Autism and Developmental Disorders

, Volume 44, Issue 1, pp 168-179

First online:

The Autism Impact Measure (AIM): Initial Development of a New Tool for Treatment Outcome Measurement

  • Stephen M. KanneAffiliated withUniversity of MissouriDepartment of Health Psychology, Thompson Center for Autism and Neurodevelopmental Disorders, University of Missouri Email author 
  • , Micah O. MazurekAffiliated withUniversity of Missouri
  • , Darryn SikoraAffiliated withProvidence Neurodevelopmental Center for Children
  • , Jayne BellandoAffiliated withUniversity of Arkansas for Medical Sciences
  • , Lee Branum-MartinAffiliated withGeorgia State University
  • , Benjamin HandenAffiliated withUniversity of Pittsburgh
  • , Terry KatzAffiliated withUniversity of Colorado School of Medicine
  • , Brian FreedmanAffiliated withUniversity of Delaware
  • , Mary Paige PowellAffiliated withCornerstone Behavioral Medicine
    • , Zachary WarrenAffiliated withVanderbilt Kennedy Center

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The current study describes the development and psychometric properties of a new measure targeting sensitivity to change of core autism spectrum disorder (ASD) symptoms, the Autism Impact Measure (AIM). The AIM uses a 2-week recall period with items rated on two corresponding 5-point scales (frequency and impact). Psychometric properties were examined using a large sample (n = 440) of children with ASD enrolled in the Autism Treatment Network. The exploratory factor analysis indicated four factors and resulted in a 25-item questionnaire with excellent overall model fit. Test–retest reliability, cross-informant reliability, and convergent validity with other measures of ASD symptoms and overall functioning were strong. The AIM is a reliable and valid measure of frequency and impact of core ASD symptoms.


Autism spectrum disorder Outcome Treatment Symptoms Impairment