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In an intriguing report from a group studying social cognition in TS, people with TS and controls demonstrated intact mentalizing when observing animated triangles demonstrating simple and complex interactions \citep*{26177119}. However, people with TS also tended to attribute human-like intentions when the two triangles were moving randomly. This tendency was not explained by clinical symptoms or by other constructs such as executive function or alexithymia.  Thresholds for externally applied sensory stimuli were similar in adults with "pure" TS and controls \citep{26818628}. These results, like those of a previous study \citep{22038938}, demonstrate that the sensory symptoms of TS are central in origin, perhaps indicating abnormalities in interoceptive awareness or central sensorimotor processing.  In a clever analysis of video recordings of the eyes, a measure of cognitive control explained half of the variance in tic severity \citep{26175694}. Blink rate—related to dopamine—was higher in children with TS than in controls. Pupil diameter—related to norepinephrine—was correlated with anxiety. In an unrelated study, TS children without ADHD or OCD had significantly greater difficulty maintaining postural stability than did control children, especially when they had to use only vestibular cues (rather than visual or somatosensory cues) \citep{25683311}.