Use of the Weekly Calendar Planning Activity to Assess Executive Function in Adolescents With Autism Spectrum Disorder.

Importance: Youths with autism spectrum disorder (ASD) have challenges with executive function (EF). However, there are few measures to objectively assess EF, such as time management and prioritization. The Weekly Calendar Planning Activity (WCPA) is a promising performance-based EF measure that has rarely been used with youths with ASD.

Objective: To characterize the performance of youths with ASD on the WCPA and the association of WCPA performance with caregiver-rated EF.

Design: Observational and summary data obtained during a baseline evaluation for a research study.

Setting: Middle school.

Participants: Thirty-nine adolescents with ASD and without an intellectual disability.

Method: Youth were administered the WCPA; caregivers completed EF ratings. Descriptive statistics characterized WCPA performance. Correlations between WCPA scores and age, IQ, and EF ratings were computed.

Results: The majority of youth performed poorly on the WCPA and lacked insight into their poor performance. Many struggled to enter appointments. Appointment accuracy was <30%. The most common errors were location errors. Appointment accuracy and planning time were moderately associated with IQ but not with caregiver-rated EF or age.

Conclusions and relevance: Overall, the WCPA was cognitively demanding for youths with ASD without an intellectual disability. These results have implications for using evidence-based strategies to teach adolescents with ASD how to manage their time and plan and prioritize homework assignments, upcoming tests or quizzes, and extracurricular activities. Plain-Language Summary: Youths with autism spectrum disorder have significant problems with executive function, particularly organization, prioritization, time management, and planning. There are few objective, performance-based measures of executive function, especially those that can be used with autistic youths. To our knowledge, this study is the first to use the Weekly Calendar Planning Activity (WCPA) with autistic adolescents who do not have an intellectual disability. The WCPA captured their deficits related to executive function and could be a useful tool for assessment and treatment planning.