Implicit sequence learning in young people with Tourette syndrome with and without co‐occurring attention‐deficit/hyperactivity disorder

Impaired habit‐learning has been proposed to underlie the tic symptoms of Tourette syndrome ( TS ). However, accounts differ in terms of how habit‐learning is altered in TS , with some authors proposing habit formation is impaired due to a deficient ‘chunking’ mechanism, and others proposing habit‐learning is overactive and tics reflect hyperlearned behaviours. Attention‐deficit/hyperactivity disorder ( ADHD ) frequently co‐occurs with TS and is...