Effects of illuminance and correlated color temperature of indoor light on emotion perception

Li, Yun; Ru, Taotao; Chen, Qingwei; Liu, Qian; Luo, Xi; Zhou, Guofu

doi:10.1038/s41598-021-93523-y

Cited by 30 publications

(18 citation statements)

References 86 publications

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“…For instance, 1500 lx vs. 150 lx and 372 lx vs. 40 lx were employed in these two studies [ 35 , 36 ], respectively, while 1000 lx vs. 100 lx was employed in the current study. The effect of illuminance on satisfaction with light was scarcely investigated [ 19 , 30 ], while previous studies had occasionally reported significant effects of bright versus dim illuminance on state self-control [ 29 , 35 , 40 , 41 , 42 ] and mood [ 16 , 59 , 64 , 65 , 66 ]. Again, the differences in light manipulation make it difficult to directly compare the findings of previous studies and the current one.…”

Section: Discussionmentioning

confidence: 99%

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Luojin

et al. 2022

IJERPH

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Ambient light plays a key role in social interactions, and the effects of ambient light on explicit altruism have been widely documented. However, whether ambient light affects implicit altruism and the potential mechanisms underlying the effect remain largely unknown. The current study aimed to explore the effects of ambient illuminance on explicit and implicit altruism simultaneously, and to determine the potential mediation role of subjective mood, state self-control perceived anonymity and satisfaction with light. A one-factor (Illuminance: dim (100 lx) vs. bright (1000 lx) at eye level), between-subjects design was employed in the current study, during which seventy-eight undergraduates (52 females, 18–25 years old) were assigned to two groups, with participants in each group undergoing both the dictator game assessing explicit altruism and the implicit association test (IAT) assessing implicit altruism under one of two illuminance conditions. Meanwhile, subjective mood, state self-control, perceived anonymity and satisfaction with light were also assessed with questionnaires at the beginning or/and at the end of the experiment. Results revealed that participants tended to allocate more money in the dictator game and showed a higher state self-control, satisfaction with light and lower perceived anonymity under bright versus dim illuminance condition, whereas the performance in IAT and subjective mood revealed no statistically significant effects of illuminance. The promoting effect of bright illuminance on explicit altruism was partially mediated by perceived anonymity and satisfaction with light, but not by state self-control. These findings suggest that ambient light holds the potential to regulate psychological well-being and thus facilitate prosocial behavior, but such benefits are dependent on the type of task.

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Section: Discussionmentioning

confidence: 99%

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Luojin

et al. 2022

IJERPH

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“…These suggest that children exhibited more engaged or joint attention, responses, and decision or desire to choose between or among objects manifested verbal or non-verbal movements in dyadic interactions when there were longer hours from sunrise to sunset and increased exposure to natural light source inside the classrooms. Through modulating circadian rhythm and sleep and activating emotion-processing brain regions, and suppression of melatonin production, UV light, illuminance, daytime light have been investigated focusing on its potential non-image forming indirect or direct regulating effects to mood or behavior 9,47,48 . Among children, these light-related indicators have been studied investigating its effects to or associations with physical activities, sedentary behaviors, socialization skills, cognitive abilities, attitudes, and energy levels in classroom settings.…”

Section: Discussionmentioning

confidence: 99%

Multilevel linear and temporal analyses on the effects of weather indices on movements and behaviors

Herbuela

Karita

Toya

et al. 2022

Preprint

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Weather indices significantly affecting movements, affective, and behavioral states remain largely unknown among children with profound or severe intellectual and multiple disabilities (PIMD/IDs). Main, seasonal interaction and 24-hour time-offsets effects of outdoor weather indices on the movements and behaviors of children with PIMD/IDs were explored using hierarchical and general linear models. Caregiver-interpreted facial, body, and limb movements and behaviors of 20 8-to 16-year-old children with PIMD/IDs and simultaneous online-API-and-sensor-collected app-based weather, proximity and time data were collected in 105 single-dyad video-recorded (30-hour) natural-child-caregiver-dyadic interactions over 5 months. Fluctuations in outdoor atmospheric pressure, humidity, cloudiness, wind speed, season, daylength, time (12 to 1 pm), and conditions were predictive of variations in movements and behaviors, which in turn, also responded to increased indoor UV, humidity, and cloudiness levels during winter, and increasing atmospheric pressure and decreasing humidity during fall. While outdoor temperature, atmospheric pressure, humidity, and cloudiness immediately affected variations in movement and behavior outcomes, time-offset wind-related indices had significant delayed effects at several time lags. Evidently, variations in movements and behaviors of children with PIMD/IDs are affected by seasonal variations and current or delayed fluctuating levels of outdoor weather indices which has significant implications for communication and educational interventions.

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“…In turn, red light can be used to reduce daytime sleep inertia and improve short-term performance [ 15 , 16 ]. In addition, some findings highlighted the role of CCT in regulating instant emotion perception and showed lower CCT significantly decreased negative response bias in the face judgment tasks [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

When Lights Can Breathe: Investigating the Influences of Breathing Lights on Users’ Emotion

Wang

et al. 2022

IJERPH

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Light can significantly influence users’ physiological and behavioural performance. However, how light breathing influences users’ mood regulation remains unknown. To fill this gap, this study conducted a 2-by-2 experiment (N = 20) with light breathing as the between-subject factor and light condition as the within-subject factor. Both physiological indicators and subjective indicators are measured to reflect mood regulation. The data were analysed using a generalised linear mixed model. The results showed that breathing lights are effective in regulating users’ moods. More specifically, breathing lights help users lower their electrodermal values and heart rates. Users did not report any significant difference in terms of subjective measures, which suggest that the influence of a breathing light happens unconsciously. Furthermore, this effect is significant for both cold and warm colour temperatures. Designers and engineers can use the research findings to manage user emotion when necessary.

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Effects of illuminance and correlated color temperature of indoor light on emotion perception

Cited by 30 publications

References 86 publications

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Multilevel linear and temporal analyses on the effects of weather indices on movements and behaviors

When Lights Can Breathe: Investigating the Influences of Breathing Lights on Users’ Emotion

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