The effect of dynamic light on (psycho)physiological correlates of alertness and sleepiness

Completed

Conditions: nighttime alertness and performance
nighttime alertness
sleepiness

Registration Number: NL-OMON40184

Lead Sponsor: Rijksuniversiteit Groningen

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Completed

Sex: Not specified

Target Recruitment: 36

Inclusion Criteria

healthy men and women, aged 18-30y
normal chronotype
women using hormonal anticonception

Exclusion Criteria

short (<6.5h) or long sleeper (>9h)
extreme early (MSFsc<3.74h) or extreme late chronotype (>5.77h)
chronic (psychiatric or somatic) disease
sleep disorder
eye complaints or eye surgery in the past (excluding use of contact lenses or glasses)
use of chronic (photosensitizing) medication in 3 months prior to the start of the study
regularly use of sleep medication or stimulating drugs
colour blindness
more than 3 glasses of alcohol on working days, and or the regularly use of drugs
more than 8 caffinated drinks per day
regularly napping (more than 2 times a week)
shiftwork in 3 months prior to the start of the study and/or going out on more than two days per week until at least 7 am
travelled across more than 1 timezone in the month prior to the start of the study

Study & Design

Study Type: Interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>Performance, alertness and sleepiness</p><br>

Secondary Outcome Measures

Name	Time	Method
<p>Skin temperature, salivary melatonin concentration, heart rate and<br /><br>electroencephalography EEG power in the delta and theta frequency bands. </p><br>