Study finds that subtle, unconscious increases in arousal, indicated by a faster heartbeat and dilated pupils, shape our confidence for visual experiences. Findings raise the possibility that patients suffering from depression and anxiety might perceive an unrealistically certain or uncertain world.

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Study finds that subtle, unconscious increases in arousal, indicated by a faster heartbeat and dilated pupils, shape our confidence for visual experiences. Findings raise the possibility that patients suffering from depression and anxiety might perceive an unrealistically certain or uncertain world.