data_type,description,files
time,Timestamp of sample collection,ecg.csv; eda.csv; fitbit_heart_rate_per_minute.csv; fitbit_heart_rate_per_second.csv
ecg,Electrocardiogram waveform,ecg.csv
eda,Electrodermal activity,eda.csv
heart_rate,Heart rate measured per second and per minute,fitbit_heart_rate_per_second.csv; fitbit_heart_rate_per_minute.csv
heart_rate_zones,Daily summary of heart rate zones,fitbit_heart_rate_summary.csv
questionnaires,Perceived stress and anxiety scores,pss_14.csv; stai.csv
demographics,Participant demographic data,participants.csv