Personal light exposure dataset for Izmir, Türkiye; collected by Izmir Institute of Technology (IZTECH) following the protocol of Guidolin et al. 2024 (MeLiDos field study)
Version v1.0.1
This repository contains the comprehensive dataset for the MeLiDos field study site of Izmir, Türkiye. Data were collected by Izmir Institute of Technology (IZTECH) and are further processed and analysed by the Translational Sensory & Circadian Neuroscience Unit (TSCN). A detailed description of the experiment is available in Guidolin et al., 2024.
This repository is transitioning towards a FAIR and fully human and machine-readable light exposure dataset, based on a community-based and peer-reviewed Metadata descriptor. As part of this transition, files will be converted from semi-rectangular data, to fully tabular data. Further, metadata will be added and converted from XLSX to JSON. For full traceability, all versions will be archived in Zenodo and are accessible through their own persistent identifier (DOI).
APA reference:
Didikoglu, A., Akgun, S. G., Aydin, S. N., Kayar, Z., Zauner, J., & Spitschan, M. (2025). Personal light exposure dataset for Izmir, Türkiye (Version 1.0.1) [Data set]. URL: https://github.com/MeLiDosProject/DidikogluEtAl_Dataset_2025. DOI: doi.org/10.5281/zenodo.16568109
| Dataset name | IZTECH |
|---|---|
| Period of data collection (total) | December 2024 to June 2025 |
| Location | Izmir, Türkiye |
| Number of participants enrolled | N=17 |
| Number of participants included in data analysis and this repository | N=17 |
| Duration of experiment for each participant | N=7 days (Monday to Monday) |
The following files are included with this Dataset:
-
data/Metadata_MeLiDos_IZTECH.xlsx: Preliminary Metadata prior to conversion to JSON -
data/Study_dates_MeLiDos_IZTECH.xlsx: Recruitment dates to clean light exposure recordings -
data: Folder with measurement and project data in the following structure:
data/
raw/
group/
chronotype/
demographics/
discharge/
screening/
individual/
$ParticipantID/
chronotype/
continuous/
actlumus_wrist/
actlumus_head/
actlumus_chest/
actlumus_environment/
currentconditions/
exercisediary/
experiencelog/
mHLEA_digital/
mHLEA_paper/
sleepdiary/
wearlog/
wellbeingdiary/
demographics/
discharge/
screening/
LICENSE: Licensing terms. This dataset is published with a permissive CC-BY-4.0 license
All data are anonymous.
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 |
|---|---|
| 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=17 participants. |
| demographics | N=1 csv files. Contains demographic information for N=17 participants. |
| discharge | N=1 csv file, which contains answers from all questionnaires that N=17 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 multiple choice questions). |
| screening | N=1 csv file for N=17 participants containing screening information. |
This folder contains individual-level data for N=17 participant, each stored in a separate folder named after the participant ID (PID). The data within each participant folder follows the following structure.
| Folder name | Content |
|---|---|
| continuous/actlumus_chest | txt files from ActLumus worn at chest level, one for each participant. Also, a report (_Report) from the device. |
| continuous/actlumus_head | txt files from ActLumus worn at eye level, one for each participant. Also, a report (_Report) from the device. Note: Participant IZTECH_S004 has two separate light exposure measurement files. |
| continuous/actlumus_wrist | txt files from ActLumus worn at the wrist, one for each participant. Also, a report (_Report) from the device. Note: Participant IZTECH_S016 has a sampling interval of 120 seconds instead of 10 seconds. |
| continuous/actlumus_environment | txt files from ActLumus placed on the south-facing exterior wall of the Izmir Institute of Technology Molecular Biology and Genetics Building, one for each participant. Also, a report (_Report) from the device. |
| continuous/currenconditions/ | 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. The participant sometimes additionally reported upon waking and before going to bed. |
| continuous/exercisediary/ | Custom made questionnaire on exercise. Completed daily in the evening |
| continuous/experiencelog/ | Custom made questionnaire about experiences wearing the light glasses. Completed any time participant had an experience to report (no restrictions). |
| continuous/mHLEA_digital/ | Custom made questionnaire to test Daily in the evening |
| continuous/mHLEA_paper/ | Custom made paper-based questionnaire to test Daily in the evening. This was transcribed to xlsx files by the experimenter after study end for each participant. |
| continuous/sleepdiary/ | Daily in the morning |
| continuous/wearlog/ | Any time participant had removed or started wearing the light logger |
| continuous/wellbeingdiary/ | Daily in the evening |
| chronotype/ | Munich Chronotype Questionnaire (MCTQ) & Morning Eveningness Questionnaire (MEQ) completed at study intake (Monday, day 1) |
| demographics/ | Screening questionnaire containing demographic and health information. Completed online before study intake. |
| discharge/ | n=5 csv files with LEBA, VLSQ8, feedback, mTFA, and ASE. Completed at discharge (Monday, day 8). |