The use of digital tools to measure physiological and behavioural variables of potential
relevance to mental health is a growing field sitting at the intersection between computer …

AimsLay opinions and published papers alike suggest mood varies with the seasons,
commonly framed as higher rates of depression mood in winter. Memory and confirmation …

The hypothesis of whether day length (photoperiod) is an important zeitgeber (time‐giver)
for keeping the circadian rhythm entrained to a 24‐hour cycle was examined, as was its …

Light is considered the most potent synchronizer of the human circadian system and exerts
many other non-image-forming effects, including those that affect brain function. These …

Lighting design for office buildings has focused largely on providing sufficient light for visual
performance, minimal glare, good colour rendering and energy conservation. Little attention …

Background Seasonal variations in physiology and behavior have frequently been reported.
Light is the major zeitgeber for synchronizing internal circadian rhythms with the external …

Introduction Mania is associated with increased activity, whereas psychomotor retardation is
often found in bipolar depression. Actigraphy is a promising tool for monitoring phase shifts …

The study aimed to test whether a shift in chronotype (determined by mid-sleep on free days)
is associated with alterations in psychological well-being and sleep parameters. One …

Objective Daylight is an important zeitgeber for entraining the circadian rhythm to a 24 h
clock cycle, especially within the Polar circle, which has long Polar nights several months …

The normal alignment of circadian rhythms with the 24-h light-dark cycle is disrupted after
rapid travel between home and destination time zones, leading to sleep problems …