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Abstract:
The present studies investigated implicit probabilistic sequence learning (PSL) in Tourette syndrome (TS). The first study assessed PSL in children
with TS, ADHD, comorbid TS-ADHD, and typically developing (TD) children. All four groups showed evidence of sequence learning and did not
differ from each other on measures of PSL. The second study compared PSL between children with TS and TD children. The PSL task was
assessed in two sessions with a 16-hour delay. Children with TS showed higher PSL than TD children at the end of the first session. However,
children with TS showed weaker consolidation. In sum, children with TS showed intact online PSL but impaired consolidation and comorbid ADHD
did not contribute to this difference in learning.
