Cognitive performance has been extensively investigated in relation to insomnia, yet review
of the literature reveals discrepant findings. The current study aimed to synthesize this …

Until recently, the association of chronic insomnia with significant medical morbidity was not
established and its diagnosis was based solely on subjective complaints. We present …

Insomnia is one of the most common subjective sleep complaints in the general and clinical
adult populations, 1, 2 and is characterized by persistent difficulty with the initiation and/or …

OBJECTIVES: Individuals with insomnia consistently report difficulties pertaining to their
cognitive functioning (eg, memory, concentration). However, objective measurements of …

Primary insomnia is defined as difficulties in falling asleep, maintaining sleep or non-
restorative sleep accompanied by significantly impaired daytime functioning in the absence …

While high levels of activity and exercise training have been associated with improvements
in sleep quality, minimum levels of activity likely to improve sleep outcomes have not been …

Health-related Quality of Life (HRQoL) has become an important construct in contemporary
medicine and health care, permitting assessment of disorder burden and evaluation of …

Abstract Study Objectives: The aims of this study were to (1) investigate the nature of
cognitive impairment in individuals with insomnia,(2) document their clinical significance,(3) …

The common assumption that population sleep duration has declined in the past few
decades has not been supported by recent reviews, which have been limited to self-reported …

OBJECTIVES: To test whether individual differences in gratitude are related to sleep after
controlling for neuroticism and other traits. To test whether pre-sleep cognitions are the …