Fig. 3: Relationships between recent light exposure and cognitive performance.
From: Relationships between light exposure and aspects of cognitive function in everyday life
A Heatmap shows standardized coefficients from linear mixed models comparing 30-, 60-, 90-, and 120 min light history with cognitive outcomes, including adjustments for time of day, time awake, last sleep duration, and last sleep midpoint. *p < 0.05; **p < 0.013. KSS Karolinska Sleepiness Scale; PVT Psychomotor Vigilance Task; NB3 3-Back Working Memory Test; VS Visual Search Task; RT reaction time; FPR false positive rate; FNR false negative rate. B–D Changes in cognitive performance with melanopic equivalent daylight illuminance (EDI, log lux) history (KSS: n = 1234, PVT: n = 1222, NB3: n = 1212). B Sleepiness (KSS) vs. 30-minute light history, C Psychomotor Vigilance Task (PVT) median reaction time (ms) vs. 30 min light history, and D 3-Back Working Memory Task (NB3) median reaction time (ms) vs. 30-minute light history. B–D The left plots illustrate linear regression lines for each individual. The right distribution plots display the mean and scatter of slopes derived from linear fits for each individual, with NB3 slopes adjusted for the learning effect.
