Anxiety and depression in young children are hard to detect and often go untreated, potentially leading to anxiety disorders and increased risk of suicide and drug abuse later. In a new study, researchers showed a wearable sensor detected these ‘internalizing disorders’ in children with 81 percent accuracy, reducing to 20 seconds what would take clinicians months to diagnose, opening the door to inexpensive screening that could be part of routine developmental assessments.

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