The effects of treatment room lighting color on time perception and emotion

Abstract

[Purpose] The purpose of this study was to investigate the perceived treatment times and emotional reactions under different light colors in the treatment room. [Subjects and Methods] Subjects in this study were 20 healthy young students in their 20s. Under each lighting condition (blue, red, white, and yellow) differentiated by color, each subject laid on a therapeutic bed and underwent ultrasound therapy. Subjects were instructed to press a stopwatch every 1 minute, for a total of 5 times, after therapy started according to their perception of time while the stopwatch’s time indicator was blocked. After the experiments, self-administered questionnaires were given to subjects to measure their emotional reactions. [Results] In terms of K-POMS scores, the mood states of depression-dejection, anger-hostility, and confusion-bewilderment were higher scores for blue and red lights compared to yellow light. The mood state of vigor-activity were higher scores for yellow and white lights compared to blue and red lights. [Conclusion] Therefore, it is important to take necessary measures to prevent the negative effects that blue and red light-based therapy can have on patient mood.

Analysis of Customers’ Visual Comfort Perception and Mood for Cafés using Colored Glass Curtain

“…Their study showed that luminaires applied below the peripheral vision of a sitting customer can significantly elevate a customer's enjoyment of the dining experience in a static mode of lighting when compared to more dynamic forms of illumination. This finding is in accordance with Boyce's statement on the importance of low levels of light in café settings as this can create an ambiance that is more favorable for customers [17]. This study refers to the circadian rhythm, which determines the production of cortisol to maintain healthy body functions, such as glucose conversion and the creation of melatonin hormones, which regulate sleep.…”

“…Therefore, although Han & Lee [17] have stated that blue and red colored lighting in a room evoke a higher state of a particular mood, i.e. "depressiondejection, anger-hostility, and confusion-bewilderment", in comparison to yellow lighting, these conditions did not seem to apply in the present experiment.…”

Demographic-related variables impact subjective experiences of patient wait times and perceived attention afforded in surgical outpatient clinic encounters

“…17 It is possible that even previously assumed minor factors such as waiting room lighting, for instance, may also positively impact the waiting experience. 18…”

Time-of-day Dependent Light Effects on Subjective Affect and Comfort

“…Since Kripke et al (1983) found that exposure with high-intensity light can reduce the depression symptoms in patients with depressive disorder 2 , light had been widely used to treat affective disorder in clinical practice [3][4][5] . In recent years, researches have also suggested signi cant effects of light on subjective affect and comfort in normal population 1,[6][7][8] , which provided possibilities for using light to improve subjective well-being in daily life and attracted sustainable attention in the past decades.…”

“…Previous studies had con rmed the effectiveness of short-term light exposure on modulating physical and psychological processes 8,13,27,28 . In the current study, we examined the effects of short-term light exposure with different combination of illuminance, CCT, and exposed time of day on subjective affect and comfort to minimize the confounding in uence of fatigue on subjective feelings.…”