This dataset was collected as part of an observational study on personal light exposure. A detailed description of the experiment is available as a preprint (Guidolin et al., 2023).
| Dataset name | cyepi |
|---|---|
| Period of data collection (total) | August 2023 to November 2023 |
| Location | Tübingen, Germany |
| Number of participants enrolled | N=30 |
| Number of participants included in data analysis and this repository | N=26 |
| Duration of experiment for each participant | N=7 days (Monday to Monday) |
| Read-out | Measurement modality | Sampling frequency | Timing of sampling | N per participant |
|---|---|---|---|---|
| Objective individual light exposure | Light logger | Continuous measurement over 7 days | Every 10 seconds | Approx. 10080 |
| Objective activity/rest | Actimeter | Continuous measurement over 7 days | Every 10 seconds | Approx. 10080 |
| Chronotype | Munich Chronotype Questionnaire (MCTQ, circadian time) and Morning Evening Questionnaire (MEQ, circadian preference) | 1 measurement over 7 days | First experimental day | 1 |
| Subjective sleep | Consensus Sleep Diary (CSD) | 7 measurements over 7 days | Every morning | 7 |
| Subjective hourly light exposure and activities | Modified Harvard Light Exposure Questionnaire (modified H-LEA) | 7 measurements over 7 days | Every evening | 7 |
| Subjective wellbeing | WHO-5 wellbeing index (WHO-5) | 7 measurements over 7 days | Every evening | 7 |
| Exercise frequency and type | Exercise log | 7 measurements over 7 days | Every evening | 7 |
| Subjective light exposure | Modified Harvard Light Exposure Questionnaire (modified H-LEA). Experience sampling: punctual measurement on participants’ current light conditions | 24 measurements over 7 days | 4 times/day | 22 |
| Subjective alertness | Karolinska Sleepiness Scale (KSS). Experience sampling: punctual measurement on participants' current light conditions | 22 measurements over 7 days | 4 times/day | 22 |
| Subjective mood | MoodZoom questionnaire | 22 measurements over 7 days | 4 times/day | 22 |
| Experience log | Custom-made questionnaire and open-ended questions about positive and negative experiences wearing the light logger | Continuous measurement over 7 days | Throughout the experiment | Depending on participant |
| Wear log | Custom-made questionnaire about time of taking the device off and putting it back on | Continuous measurement over 7 days | Throughout the experiment | Depending on participant |
| Subjective light sensitivity | Visual Light Sensitivity Questionnaire 8 (VLSQ-8) | 1 measurement over 7 days | Last experimental day | 1 |
| User experience of wearing the light logger | Open-ended questions | 1 measurement over 7 days | Last experimental day | 1 |
| Sleep environment | Assessment of sleep environment questionnaire (ASE) | 1 measurement over 7 days | Last experimental day | 1 |
| Subjective light exposure | Light Exposure Behaviour Assessment (LEBA) | 1 measurement over 7 days | Last experimental day | 1 |
This folder contains grouped data, i.e. any data that are collected at the group level and/or were grouped to facilitate import during analyses.
| Folder name | Content |
|---|---|
| actlumus | N=26 files from ActLumus, one for each participant |
| acttrust | N=26 files from ActTrust2, one for each participant |
| chronotype | N=2 csv files, one for the Morning Eveningness Questionnaire (MEQ) and one for the Munich Chronotype Questionnaire (MCTQ). Each contains data for N=26 participants. |
| demographics | N=2 csv files. “201_231_demog_20231123.csv” contains only demographic information for N=26 participants. “201_231_demog_health_20231123.csv” contains both demographic as well as health information for N=26 participants. |
| discharge | N=1 csv file, which contains answers from all N=5 questionnaires that N=26 participants had to fill at discharge: 1) Light Exposure Behaviour Assessment (LEBA instrument), 2) Visual Light Sensitivity Questionnaire-8 (VLSQ-8), 3) Assessment of Sleep Environment (ASE) questionnaire, 4) Modified Theory Framework of Acceptability (mTFA) questionnaire, 5) Feedback (1 Y/N and 6 multiple choice questions). |
| sleepdiary | N=26 csv files, each corresponding to the sleep diary of an individual participant. |
| wearlog | N=26 csv files, each corresponding to the wear log participants filled multiple times/day. |
This folder contains individual-level data for N=26 participant, each stored in a separate folder named after the participant ID (PID). Furthermore, it also contains a folder where the ActLumus files for the environmental light light logger (named “ambient”) are stored. The data within each participant folder follows the following structure.
| Folder name | Filename (sample) | Description and time of completion | Notes |
|---|---|---|---|
| chronotype/ | PID_mctq_yyyymmdd.csv | Munich Chronotype Questionnaire (MCTQ) completed at study intake (Monday, day 1) | |
| chronotype/ | PID_meq_yyyymmdd.csv | Morning Eveningness Questionnaire (MEQ) completed at study intake (Monday, day 1) | |
| continuous/actlumus/ | PID_actlumus_Log_automatedtimestamp.txt | ActLumus data, collected continuously (every 10 seconds) over the 8 days | |
| continuous/actlumus/ | PID_actlumus_Log_automatedtimestamp_Report.txt | N/A. This is a automated report which is saved with the actual data. | |
| continuous/acttrust/ | PID_acttrust_Log_automatedtimestamp.txt | ActTrust2 data, collected continuously (every 60 seconds) over the 8 days | |
| continuous/acttrust/ | PID_actlumus_Log_automatedtimestamp_Report.txt | N/A. This is a automated report which is saved with the actual data. | This is missing for PID 202 and PID 204 |
| continuous/currenconditions/ | PID_currenconditions_yyyymmdd.csv | Questionnaire comprising 3 questionnaires on 1) current mood (MoodZoom), 2) light conditions (custom) and 3) alertness (Karolinska Sleepiness Scale). Completed 4/times per day, at 11:00, 14:00, 17:00 and 20:00. Participants instructed to completed as close as possible to the indicated times. | |
| continuous/exercisediary/ | PID_exercisediary_yyyymmdd.csv | Custom made questionnaire on exercise. Completed daily in the evening | |
| continuous/experiencelog/ | PID_experiencelog_yyyymmdd.csv | Custom made questionnaire about experiences wearing the light glasses. Completed any time participant had an experience to report (n**o restrictions). | Empty folder for PID 210 and 225 |
| continuous/mHLEA_digital/ | PID_mHLEA_digital_yyyymmdd.csv | Custom made questionnaire to test Daily in the evening | |
| continuous/mHLEA_paper/ | PID_mHLEA_paper_yyyymmdd.xlsx | N/A. This was transcribed by the experimenter after study end for each participant. | For PID 201 to 216, this includes only subjective light exposure (see questionnaires-coding: mHLEA_v1). For PID 218 to 231, this includes not only light exposure but also hourly self-reported activity (see questionnaires-coding: mHLEA_activity_v2). |
| continuous/mHLEA_paper/upload/ | jpg, png or heic files from participants phones that were sent to experimenter during the week, later transcribed into the PID_mHLEA_paper_yyyymmdd.xlsx file | Daily in the evening | This folder is only present for PID 216 to 231. |
| continuous/sleepdiary/ | PID_sleepdiary_yyyymmdd.csv | Daily in the morning | |
| continuous/wearlog/ | PID_wearlog_yyyymmdd.csv | Any time participant had removed or started wearing the light logger | |
| continuous/wellbeingdiary/ | PID_wellebeingdiary_yyyymmdd.csv | Daily in the evening | |
| demographics/ | PID_demog_yyyymmdd.csv | Screening questionnaire containing demographic and health information. Completed online before study intake. | |
| discharge/ | PID_ASE_yyyymmdd.csv | Completed at discharge (Monday, day 8). | From PID 221 to 231, the discharge folder contains only one csv file names “PID_discharge_yyyymmdd.csv” where all the five questionnaires are saved together. |
| discharge/ | PID_LEBA_yyyymmdd.csv | Completed at discharge (Monday, day 8). | |
| discharge/ | PID_VLSQ8_yyyymmdd.csv | Completed at discharge (Monday, day 8). | |
| discharge/ | PID_feedback_yyyymmdd.csv | Completed at discharge (Monday, day 8). | |
| discharge/ | PID_mTFA_yyyymmdd.csv | Completed at discharge (Monday, day 8). |
The folder "ambient" contains the txt files and reports from the environmental light logger (ActLumus) placed on the rooftop of the laboratory, which measured data with a temporal frequency of 30 seconds. Furthermore, the xlxs file "cyepi_amb_schedule" contains, for every calendar week in which participants took part in the experiment, timestamps for when the experimenter cleaned the set-up and related comments.
This folder contains R scripts to pre-process the data, specifically to clean the wear log data, and integrate it with the light logger dataset using LightLogR.
Contains R scripts to import data from the ActLumus light logger (import_LL), the ActTrust2 actimeter (import_activity), use of black bag to log non-wear time (import_blackbag) and the Wear log questionnaire (importwearlog).
Contains R script to clean the sleep diary data (sleep_qualitycheck) and the wear log data (wearlog_qualitychecks) as well as fusing the wear log data with the light logger dataset (wearlog_LL_fusion).
This folder contains codebooks for all questionnaires administered to participants throughout the experiments. The codebook explains how, in each questionnaire, participants' answers were coded.