Related Experiment Video
Updated: Jul 9, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
Published on: April 26, 2024
Sleep preoccupation in poor sleepers: psychometric properties of the Sleep Preoccupation Scale
Jason Ellis1, Kathryn Mitchell, Henriette Hogh
1Division of Community Based Sciences, Department of Psychological Medicine, University of Glasgow, Glasgow, United Kingdom. j.ellis@clinmed.gla.ac.uk
Objectives:
Despite daytime factors being implicated as having a key perpetuating role in many of the recent cognitive models of sleep disturbance, standardized, validated measures of sleep-related daytime processing are rare. The aim of the present studies was to develop, refine, and psychometrically evaluate the Sleep Preoccupation Scale (SPS), a self-report tool that examines levels of daytime sleep-related processing.
Methods:
The SPS is constructed using a quantitative content analysis of responses from a survey of older adults (n=116). The scale is then refined using principal components analysis on a general population sample (n=456), and finally, the convergent validity is examined in a general population sample (n=722).
Results:
The results suggest the SPS is a reliable and valid measure of sleep-related daytime processing and discriminates different sleeper groups (poor, average, and good sleepers).
Conclusion:
The findings are related to the models of poor sleep and, in particular, insomnia, and future directions are discussed.
Related Concept Videos
Insufficient Sleep and Sleep Deprivation
Sleep deprivation is a more severe form of sleep loss...
Substance Use Disorders Affecting Sleep
Understanding the concepts of physical dependence,...
Insomnia
Multiple factors contribute...
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
REM Sleep Behavior Disorder
RBD is significantly associated with...
Self-Report Tests of Personality

