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| Baby videos provide a clue \citep{26246137} | Videos of 18 boys, recorded before age 6 months, showed more fidgety movements in 10 boys who later were diagnosed with autism spectrum disorder than in 8 boys who had only transient autistic features. Many of the latter had tics and ADHD. These results, combined with the recent nearly ubiquitous availability of home baby videos in some cultures, suggest a pseudo-prospective study design to identify features predicting later development of TS.|  | The eyes have it \citep{26175694} | A measure of cognitive control explained half of the variance in tic severity. Blink rate—related to dopamine—was higher in children with TS than in controls. Pupil diameter—related to norepinephrine—was correlated to anxiety. |  | Electrophysiological similarities in Tourette syndrome and chronic tic disorder \citep{26531497} | – |  | Enhanced habit formation in Gilles de la Tourette syndrome \citep{26490329} | In an intrumental learning task, "unmedicated patients relied predominantly on habitual, outcome-insensitive behavioural control." This reliance was greater in patients with greater current tic severity. |