“…The same participating infants were also brought into the laboratory where we measured their reactivity while administering an attention task to measure visual sustained attention, and a behavioural task (still‐face protocol) to measure emotion reactivity. Early atypical performance on both of these tasks has been linked to a range of later psychopathologies (Johnson, Gliga, Jones, & Charman, ; Jones, Gliga, Bedford, Charman, & Johnson, ; Kahle, Miller, Helm, & Hastings, ; Santucci et al., ). Autonomic arousal was assessed using a combination of electrocardiography (ECG), heart rate variability and actigraphy (Cacioppo, Tassinary, & Berntson, ).…”