The role of executive function in the production of disfluency: A study based on Attention-Deficit/Hyperactivity Disorder
Theoretical models of Attention-Deficit/Hyperactivity Disorder (ADHD) assume a prominent role for deficits in response inhibition (Nigg, 2001). In this talk, I will present data from a series of papers in which I and my colleagues investigated the grammaticality and fluency of language production in adolescents and adults with ADHD and typically-developing controls. Results from two different production tasks will be presented. One involves sentence production and the other involves network descriptions. We found that participants with ADHD produced more ungrammatical and disfluent utterances. Moreover, the types of disfluency produced varied as a function of task and ADHD subtype. Conclusions focus on the role that executive functions play in theories of error detection and speech monitoring.