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20 0 -2 -4 -6 -8 -10 -12 Total Mood Disturbance Figure 6: Total Mood Disturbance by Light Condition This graph shows the change in reported Total Mood Disturbance (TMD) on the Profile of Mood States Short Form (POMS-SF) across three lighting conditions. Total mood disturbance was calculated by adding the subscales of the POMS-SF and then subtracting the vigor subscale. The difference scores shown here were obtained by taking the TMD from the POMS-SF administered after the end of the lighting session and subtracting it from the POMS-SF given before the lighting session. Negative scores indicate a more positive reported mood. The lighting conditions included one bright, white light (SAD), one dim, warm light (Control), and one dim, blue light (Blue). The error bars reflect the standard error of the mean. A one-way ANOVA indicated that Total Mood Disturbance was not significantly different across light condition, F(2, 10) = 0.55, p = .58. Total Mood Disturbance showed no significant variation between the three light conditions, but after all three lighting conditions, participants were more likely to indicate a better mood than when they initially started the session (means: SAD = -5.81; Control = -7.73; Blue = -4.45). The largest increase in positive mood in the control condition is possibly due to the less abrasive nature of the light. Both dim and a normative color, the control condition was also the most familiar to participants. Blue Control SAD Change in Reported Total Mood DisturbancePDF Image | The Effects of Lighting Design on Mood, Attention, and Stress
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