
Psychophysiological Evaluation of a Chronobiologically Adapted Light Management System
Field Study With Elderly Dementia Patients
Project Justification
Previous research indicates that an increased proportion of blue light has a physiologically activating and emotionally stabilizing effect. Nonetheless, its impact on patients with neurodegenerative diseases as confounding factor remains unclear. Against this background, the use and effect of an intelligent chronobiologically adapted light management system in the context of neurodegenerative diseases are evaluated. The aim is to investigate the non-visual effects on the mental and physical health of people with dementia living in a care-therapeutic facility in comparison with an independent control facility.







Care-therapeutic facility
Our Approach
Within the study, general demographic and facility-related data was collected. Furthermore, the general and situational anxiety of the participants was examined and a cognitive screening was carried to check and classify the presence of cognitive impairments. Moreover, the participants’ perceived sleepiness as well as personal perception of lighting were collected. In addition to the psychological assessment procedures, the study also included an endocrinological analysis. Therefore, hormone levels of cortisol, progesterone and testosterone were measured via endocrinal hair analysis.


Procedure of the endocrinological hair sample analysis
Insights and Outcomes






Procedure of the endocrinological hair sample analysis
Related Projects
Long-term measurement of spectral light conditions in Portuguese rehab settings
Long-term psychoneuro-endocrinologic evaluation of a chronobiologically adapted light system