The Impact of Light Exposure on Cognitive Function in Classrooms

Phase 1

Recruiting

• Conditions: Healthy
• Interventions: Device: Light emitting glasses

• Registration Number: NCT06325150
• Lead Sponsor: Michigan State University

Brief Summary

Humans are constantly exposed to a variety of light types, created naturally or through artificial means. Light exposure captured by the eyes impacts many physiological functions in humans, including but not limited to cognitive output, fatigue levels, and mood regulation. The level of impact on cognitive learning from different types of light on undergraduate adult students remains unclear.

Detailed Description

This study has chosen to test light's impact on adult (18 years and older) undergraduate students' cognitive function. We hypothesize that students who wear light-enriched Type1 glasses (bright light emitting glasses) for one session (20 minutes) will experience greater cognitive function, than those who either wear light-enriched Type 2 glasses(placebo light) or no glasses at all.

This study will answer the following questions:

1. After a single session (20 minutes) of wearing light-enriched glasses, on average how much did the students' cognitive function increase as compared to students without light-enriched glasses?

2. Does cognitive function increase to a comparable degree using both types of light-enriched glasses for a single session (20 minutes)?

3. Does the time of day impact the effects of light-enriched glasses during a single session (20 minutes), thus improve cognitive function?

4. Does time of day impact cognitive function for students who do not participate in light-enriched testing?

The study will gather additional data variables on the following questions:

5. After wearing either type of light-enriched glasses, did the student's fatigue decrease throughout the study? How does this data compare to those who did not take part in light glasses testing?

6. After wearing either type of light-enriched glasses, did the student's mood increase throughout the study? How does this data compare to those who did not take part in light glasses testing?

7. How does the compiled data from the questionnaires and tests compare to sleep data collected from Smart Watches?

Objectives:

* Data points from participants will be captured through the following questionnaires and testing methods:

1. Consent Form (\~ 4 min)

2. Student Questionnaire (\~ 2 min) \[Demographics\]

3. Chronotype Questionnaire, Morningness - Eveningness Self-Assessment \* (\~ 4 min)\[This document tells you if you are an early bird or a night owl.\]

4. Pittsburgh Sleep Questionnaire\* (\~ 2 min) \[This document tells you your sleep quality.\]

5. PHQ-9 Test \* (\~ 2 min) \[This document assesses your mood.\]

6. PROMIS Fatigue Score Test \[Measures your current fatigue levels.\]

7. Trail Making Test \[Measures your cognitive function.\]

* Additional data variables will be obtained from sleep data captured on personal Smart Watches by participants in the study. In the Student Questionnaire, participants are asked if they would be willing and able to provide the research team with their personal sleep data, covering a time period of two weeks prior to the study and three weeks during the study. This will enable researchers to compare Smart Watch data with fatigue scores and the Sleep Quality Index (Pittsburgh Sleep Questionnaire).

* Prior to testing, light composition readings will be taken from numerous locations within the classrooms and outdoors. Light readings will be obtained through a Spectral Light Meter. These readings will allow the researchers to control for ambient light exposure prior to the testing of the light emitting glasses.

Study Timeline

• Study First Submitted: 2024-01-17
• Study First Submitted QC: 2024-03-21
• Study First Posted: 2024-03-22
• Status Verified: 2024-05
• Study Start: 2024-05-16
• Last Update Submitted: 2024-05-16
• Last Update Posted: 2024-05-20
• Primary Completion: 2027-02-01
• Study Completion: 2028-02-01

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 300

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Light glasses type 2	Light emitting glasses	Placebo light emitting glasses
Light glasses type 1	Light emitting glasses	Experimental light emitting glasses.

Primary Outcome Measures

Name	Time	Method
Assessment of attention	3 weeks. One test per week	To measure the impact of the intervention on attention, for each student we will measure the time it takes for the student to complete the provided test, and the number of errors in the test. Each student will completed the test, before and after the intervention, and the change in test score (time and errors) calculated.

Secondary Outcome Measures

Name	Time	Method
Determine how time of day impacts attention	3 weeks. One test per week	To determine how time of day impacts attention, we will reanalyze the data from "Outcome 1", and control for the time of day the students participated in the study. We will measure the time it took to complete the test, as well as the number of errors in the test.

Trial Locations

Locations (1)

Michigan State University; 🇺🇸 East Lansing, Michigan, United States