“…Further investigation into how these different modalities were used revealed that logs and videos were mostly used to evaluate the performance of the participants, either in a quantitative way using logs (Liu, Stamper, & Davenport, 2018 ;Liu et al ., 2019 ;Mock et al ., 2016 ;Sharma, Papamitsiou, et al ., 2019 ) or environment variables , or in a qualitative manner using videos (Worsley & Blikstein, 2015, 2018. The rest of the multimodal sources were used to quantify behavioral trajectories, such as interaction behavior using touch gestures (Mock et al ., 2016 ), engagement with problem space using EDA and audio (flow, stress; Worsley & Blikstein, 2015, 2018, understanding and misconceptions using physiological data (Liu et al ., 2018(Liu et al ., , 2019, and problem-solving behavior using faces and EEG (Sharma, Papamitsiou, et al ., 2019 ) and eye-tracking .…”