Bright light exposure reduces negative affect and modulates EEG activity in sleep-deprived and well-rested adolescents.

In contrast, the ND group showed no such association (ρ = –0.009, p = 0.966), and in the whole cohort, the correlation approached significance (ρ = –0.268, p = 0.072).

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Although the between-group difference in correlation coefficients did not reach statistical significance, this pattern may indicate that the neurophysiological processes engaged by light exposure are more tightly associated with affective changes under sleep deprivation.

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