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Systematically Assessing Effects of Colored Light on Humans With a Multi-modal Approach (Substudy 6 of 7)

ConditionExposure to Man-made Visible Light
Trial statusNot yet recruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18-50
SponsorUniversity of Bern

About this trial

NOTE: This is the sixth of in total 7 sub-studies related to the Ethics Committee of the Canton of Bern Ref. No. KEK-BE 2016-00674. This sub-study includes 50 participants and 8 arms, in total 350 participants will be assessed in all 7 sub-studies.

General study information: This is a randomized, cross-over, quantitative study, which investigates physiological variables, mood, and affect of healthy participants in response to colored light exposure. The Participants take part in 5-8 arms and are exposed to colored light only, or are additionally asked to solve cognitive tasks during the colored light exposure. Primary aim is to measure the change in several physiological variables, mood, and affect during colored light exposure of 15 or 45 minutes. The risk for the participants is negligible and comparable to the risk during daily life.

Eligibility criteria

This trial accepts healthy volunteers

Qualifiers

Normal color vision

Right handed

Written informed consent

Disqualifiers

Smoking

Any kind of diagnosed sleep disorder or neurological or psychiatric disorder in the last 3 months

Acute severe traumas

Chronic diseases with the necessity for medication

Trial design

Design model

Crossover

Treatments tested in this trial

  • Visible light exposure

    Other intervention

    Subjects will be exposed to visible colored light for 15 minutes. The visible light will be generated by incandescent white light bulbs and color filters.

Treatment groups

50 Participants
are divided into 8 treatment groups

8

Treatment groups

See each treatment group below.

Group A: Visible light exposure Red 30 luxExperimental treatment 1 intervention
Group B: Visible light exposure Red 120 luxExperimental treatment 1 intervention
Group C: Visible light exposure Blue 30 luxExperimental treatment 1 intervention
Group D: Visible light exposure Blue 120 luxExperimental treatment 1 intervention
Group E: Visible light exposure Green 30 luxExperimental treatment 1 intervention
Group F: Visible light exposure Green 120 luxExperimental treatment 1 intervention
Group G: Visible light exposure White 30 luxExperimental treatment 1 intervention
Group H: Visible light exposure White 120 luxExperimental treatment 1 intervention

Trial outcomes

Primary outcomes

1

Change in cerebral tissue oxygen saturation during colored light exposure compared with a baseline and a recovery period

Time frame
43 minutes (8 min baseline, 15 min colored light exposure, 20 min recovery)
2

Change in cerebral hemoglobin concentration during colored light exposure compared with a baseline and a recovery period

Time frame
43 minutes (8 min baseline, 15 min colored light exposure, 20 min recovery)
3

Change in variables of the heart rate variability during colored light exposure compared with a baseline and a recovery period

Time frame
43 minutes (8 min baseline, 15 min colored light exposure, 20 min recovery)
4

Change in variables of the electro-dermal activity during colored light exposure compared with a baseline and a recovery period

Time frame
43 minutes (8 min baseline, 15 min colored light exposure, 20 min recovery)

Secondary outcomes

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

University of Bern

Lead sponsor

Source ClinicalTrials.gov

This trial is not recruiting at the moment. You can still explore other options: