Dataset of physiological, behavioral, and self-report measures from a group decision-making lab study

This paper presents data from a study conducted in twenty groups of three participants each. Data were collected from sixty participants during a lab visit which was video recorded from several angles. Upon arrival to the lab and following informed consent, participants were told that they would be a part of a group decision-making task and were given instructions for a procedure titled “the desert survival task” Lafferty and Pond (1974). Participants were then connected to several electrodes on their upper body and palm for the collection of their electrocardiogram, respiration and electrodermal activity throughout the group task. Participants then performed the task together. The collection of physiological data from all group members was conducted simultaneously and in synchrony with the video recording. The video recordings of the group interactions were later coded by trained psychology students for positive affective behaviors made by participants (smiling and laughing) throughout the group task. Self-report measures (trait anxiety and social phobia) were collected prior to the group task from all participants. This multimodal dataset thus integrates behavioral, self-report, and physiological measures from group members, which are important for understanding group dynamics. These data will allow verification, replications, and additional analyses of the data from new perspectives.


a b s t r a c t
This paper presents data from a study conducted in twenty groups of three participants each. Data were collected from sixty participants during a lab visit which was video recorded from several angles. Upon arrival to the lab and following informed consent, participants were told that they would be a part of a group decision-making task and were given instructions for a procedure titled "the desert survival task" Lafferty and Pond (1974). Participants were then connected to several electrodes on their upper body and palm for the collection of their electrocardiogram, respiration and electrodermal activity throughout the group task. Participants then performed the task together. The collection of physiological data from all group members was conducted simultaneously and in synchrony with the video recording. The video recordings of the group interactions were later coded by trained psychology students for positive affective behaviors made by participants (smiling and laughing) throughout the group task. Self-report measures (trait anxiety and social phobia) were collected prior to the group task from all participants. This multimodal dataset thus integrates behavioral, self-report, and physiological measures from group members, which are important for understanding group dynamics. These data will allow verifi-cation, replications, and additional analyses of the data from new perspectives.
© 2022 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

Specifications Table
Subject: Neuropsychology and physiological psychology Specific subject area: This area of research focuses on the physiological mechanisms of behavior using measures of the nervous system Type of data: Tables How the data were acquired: Physiological data were acquired using MindWare Impedance Cardiograph mobile recorders connected to each individual in the group via electrodes at 500 Hz. (MindWare Technologies, Gahanna, OH). Electrocardiogram data (ECG) were obtained using a modified lead II configuration and the respiratory data for the analysis of IBI were obtained using the standard tetrapolar electrode system for impedance recording [2] . Electrodermal Activity (EDA) was collected using two disposable Ag-AgCl electrodes, placed on the palm of participants' nondominant hand. EDA and heart rate values were later outputted from the MindWare EDA/HRV analysis software. Upon arrival at the lab, participants filled out questionnaires about their level of anxiety and social phobia, and each group was recorded for later coding of positive affective behavior. Data format: Mixed (raw and preprocessed) Description of data collection: Participants were contacted via email by the experimenter and they agreed to participate in the study. Upon arrival to the lab, participants provided informed consent and filled up self-report questionnaires. They were told that they would be taking part in a joint decision-making task. The task was explained to the participants who were then connected to electrodes for physiological data collection and performed the desert survival task while being videorecorded.

Value of the Data
• This multimodal dataset includes behavioral, physiological, and self-report measures taken as part of a lab study. This method of integration necessitates a lab facility that allows for such complex data collection with specialized equipment and expertise and is therefore not often accessible to the research community. • Sharing these data will allow other researchers to use multimodal data for different purposes, such as reanalyzing data via different analysis methods, or examining novel research questions and models, theory-building and meta-analysis. • Shared datasets, like this one, support data verification and encourage replications [5] .
• This dataset will allow researchers to compare different methodologies used to assess physiological synchrony. The original paper examined physiological synchrony between participants using multidimensional recurrence quantification analysis (MdRQA) [6] . However, there are established alternative methods to calculate physiological synchrony, which may result in different or refined outcomes [7] .

Data Description
This dataset includes three types of data: Physiological, self -report survey responses and behavioral data. The survey responses and behavioral data are presented together in a table which includes each participant's demographic information, the duration of positive affective behavior coded from videos (in seconds) and participants' responses to the STAI and SPIN surveys ( Table 1 ). The surveys are provided as a supplementary file. Several physiological functions were also collected: ECG, cardiological impedance and EDA. These data allowed us to derive Heart Rate (HR), Heart Rate Variability (HRV) and EDA measures. In the data files there is one folder per participant, that contains their pre-processed HRV ( Table 2 ) and EDA ( Table 3 ) data.

Experimental Design, Materials and Methods
Participants were undergraduate students in psychology ( N = 60) who took part in the study in exchange for course credit or payment. Students were contacted via email by a research assistant, and a time slot was suggested during which they were to participate in the study. After agreeing to participate in the study, participants were asked to arrive at the lab well hydrated and to avoid caffeinated drinks and nicotine for two hours before the start. It was further explained that the study would include physiological measurements using electrodes which are non-invasive and neither dangerous nor painful. Furthermore, the participants were told that the entire study will be recorded for later analysis, which will only be conducted by members of the research team. Upon arrival to the lab, participants were informed that they would take part in a joint decision-making task in groups of three and they provided informed written consent. Participants then reported certain demographic information (age, gender) and filled in selfreport questionnaires for anxiety and social phobia -"STAI" and "SPIN"). Participants were then connected to MindWare mobile recorders (MindWare Technologies, Gahanna, OH). Participants were then asked to sit and relax for five minutes, not moving or talking at all for a physiological baseline period.
Next, participants started the desert survival group task [1] . This task was developed and utilized for examining group dynamics and it was chosen as it allowed for a social group discussion that would give rise to social interactions and be appropriate for multimodal data collection. Participants were told they had survived an airplane accident which left them stranded in the middle of a desert. Each participant was asked to rank 15 items for survival according to importance. Next, participants were asked to discuss their ranking as a group and to reach a mutually acceptable agreement for a group ranking of the 15 items necessary for survival [1] .
Positive affective behavior (smiles, laughter) was coded by two independent trained psychology students from 20 videos recorded in the lab during the study. At least 85% interrater reliability was reached for all coders in the 3 videos of each group. Coders annotated each time participants started and stopped smiling or laughing. The durations of time that group members displayed positive affect were calculated from the Noldus Observer XT (Wageningen, the Netherlands) -the event logging behavioral coding software that coders used.
To quantify individuals' traits, we used two self-report measures (provided as a supplementary file): The state trait anxiety inventory (STAI) [3] and the social phobia inventory (SPIN) [4] .
Physiological data were pre-processed by trained graduate students using the MindWare Technologies HRV and EDA applications software (v3.1.4). HRV data were visually examined to ensure the removal of artifacts and ectopic beats. The signals were amplified by a gain of 10 0 0 and filtered with a Hamming windowing function. EDA data were visually examined to identify unusual peaks or drops, which indicate corrupted data. These corrupted sections in the data were replaced using a linear spline interpolation. EDA data were excluded from the final analysis if more than 5% of the participant's data were identified as corrupted. Some data are missing in the dataset for the following reasons: (1) Positive affect could not be coded for three participants as a result of technical issues with the video recordings in one group, (2) EDA data was    (4) Four participants did not provide demographic information of their number of years in formal education programs and age, and one additional participant did not provide their age.

Ethics Statements
The Institutional Review Board of the Department of Psychology at Bar-Ilan University approved this study and we adhered to their ethical guidelines (12/2017). Informed consent of all participants has been obtained.

Declaration of Competing Interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Data Availability
Dataset of physiological, behavioral, and self-report measures from a group decision-making lab study (Original data) (Mendeley Data).