ALYUZ N., 2016, CEUR WORKSHOP PROC, V1618, P1;AMOS B., 2016, OPENFACE GEN PURPOSE;ANZALONE SM, 2015, INT J SOC ROBOT, V7, P465, DOI 10.1007/S12369-015-0298-7;BAKER RS, 2004, OFF TASK BEHAV COGNI, P383, DOI 10.1145/985692.985741, DOI 10.1145/985692.985741;BAKER R, 2014, CAMBRIDGE HANDBOOK OF THE LEARNING SCIENCES, 2ND EDITION, P253;BAKER RSJD, 2008, LECT NOTES COMPUT SC, V5091, P406;BAXTER P, 2017, PLOS ONE, V12, DOI 10.1371/JOURNAL.PONE.0178126;BEAL CR, 2004, BASICS FEEDBACK CONT, P151;BELPAEME T, 2018, SCI ROBOT, V3, DOI 10.1126/SCIROBOTICS.AAT5954;BENITEZ-QUIROZ CF, 2016, PROC CVPR IEEE, P5562, DOI 10.1109/CVPR.2016.600;BENKAOUAR W, 2012, MULTISENSORS ENGAGEM, P45;BLAYE A, 1988, THESIS U PROVENCE FR;BROWN L, 2013, IEEE SYS MAN CYBERN, P4360, DOI 10.1109/SMC.2013.744;CASTELLANO G., 2009, P 2009 INT C MULT IN, P119, DOI DOI 10.1145/1647314.1647336;CASTELLANO G, 2014, ACM T INTERACT INTEL, V4, DOI 10.1145/2622615;CASTELLANO G, 2012, PROCEEDINGS OF 2012 ASE/IEEE INTERNATIONAL CONFERENCE ON PRIVACY, SECURITY, RISK AND TRUST AND 2012 ASE/IEEE INTERNATIONAL CONFERENCE ON SOCIAL COMPUTING (SOCIALCOM/PASSAT 2012), P421, DOI 10.1109/SOCIALCOM-PASSAT.2012.51;CHAOUACHI M., 2010, P 23 INT FLOR ART IN, P355;CHI MTH, 2014, EDUC PSYCHOL-US, V49, P219, DOI 10.1080/00461520.2014.965823;COCEA M, 2009, USER MODEL USER-ADAP, V19, P341, DOI 10.1007/S11257-009-9065-5;CONATI C, 2009, USER MODEL USER-ADAP, V19, P267, DOI 10.1007/S11257-009-9062-8;CORBETT AT, 1995, KNOWLEDGE TRACING MO;D'MELLO S, 2014, LEARN INSTR, V29, P153, DOI 10.1016/J.LEARNINSTRUC.2012.05.003;D'MELLO S, 2012, LEARN INSTR, V22, P145, DOI 10.1016/J.LEARNINSTRUC.2011.10.001;D'MELLO SK, 2008, USER MODEL USER-ADAP, V18, P45, DOI 10.1007/S11257-007-9037-6;DECI E, 2017, INTRINSIC MOTIVATION, DOI 10.1016/B978-0-12-809324-5.05613-3, DOI 10.1016/B978-0-12-809324-5.05613-3;DESMARAIS MC, 2012, USER MODEL USER-ADAP, V22, P9, DOI 10.1007/S11257-011-9106-8;DEWAN M. ALI AKBER, 2019, SMART LEARNING ENVIRONMENTS, V6, DOI 10.1186/S40561-018-0080-Z;DILLENBOURG P., 1996, LEARNING HUMANS MACH, P189, DOI DOI 10.1007/978-1-4020-9827-7_1;DO-LENH S, 2012, SUPPORTING REFLECTIO, V5313, P241, DOI 10.5075/EPFL-THESIS-5313, DOI 10.5075/EPFL-THESIS-5313;FOSTER ME, 2017, INT J SOC ROBOT, V9, P659, DOI 10.1007/S12369-017-0414-Y;GATICA-PEREZ D, 2005, INT CONF ACOUST SPEE, P489;GLACHAN M, 1982, SOCIAL COGNITION STU, V2, P238;GORDON G, 2016, THIRTIETH AAAI CONFERENCE ON ARTIFICIAL INTELLIGENCE, P3951;HENRIE CR, 2015, COMPUT EDUC, V90, P36, DOI 10.1016/J.COMPEDU.2015.09.005;HUANG CM, 2014, ACMIEEE INT CONF HUM, P57, DOI 10.1145/2559636.2559668;ISHII R, 2011, HUM FACTORS;ISHII RYO, 2010, P 2010 WORKSH EYE GA, P33, DOI DOI 10.1145/2002333.2002339;KAPOOR A, 2006, MULTIMODAL AFFECT RE, P677, DOI 10.1145/1101149.1101300, DOI 10.1145/1101149.1101300;KAPUR M, 2008, COGNITION INSTRUCT, V26, P379, DOI 10.1080/07370000802212669;KIM J, 2016, AUTOMATIC DETECTION, DOI 10.21437/WOCCI.2016-5, DOI 10.21437/WOCCI.2016-5;KORB S, 2014, PLOS ONE, V9, DOI 10.1371/JOURNAL.PONE.0099194;KULIC D, 2007, IEEE T ROBOT, V23, P991, DOI 10.1109/TRO.2007.904899;MASLOW AH, 1943, PSYCHOL REV, V50, P370, DOI 10.1037/H0054346;NASIR J, 2020, PE HRI MULTIMODAL DA, DOI 10.5281/ZENODO.4288833, DOI 10.5281/ZENODO.4288833;NASIR J, 2020, IEEE ROMAN, P313, DOI 10.1109/RO-MAN47096.2020.9223343;NEZAMI OM, 2018, ENGAGEMENT RECOGNITI;O'BRIEN HL, 2008, J AM SOC INF SCI TEC, V59, P938, DOI 10.1002/ASI.20801;O'BRIEN HL, 2016, PROCEEDINGS OF THE 2016 ACM CONFERENCE ON HUMAN INFORMATION INTERACTION AND RETRIEVAL (CHIIR'16), P71, DOI 10.1145/2854946.2854973;O'BRIEN HL, 2010, J AM SOC INF SCI TEC, V61, P50, DOI 10.1002/ASI.21229;OERTEL C, 2020, FRONT ROBOT AI, V7, DOI 10.3389/FROBT.2020.00092;OERTEL C, 2011, 12TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION 2011 (INTERSPEECH 2011), VOLS 1-5, P1552;OGGI O, 2019, PERSONALIZED ESTIMAT;PAPADOPOULOS F., 2013, EMB COMM GOALS INT W, V13, P1;PARDOS ZA, 2010, LECT NOTES COMPUT SC, V6075, P255, DOI 10.1007/978-3-642-13470-8_24;PARSONS J, 2011, STUDENT ENGAGEMENT W;PEDREGOSA F, 2011, J MACH LEARN RES, V12, P2825;PERUGIA G., 2020, IEEE T AFFECTIVE COM, DOI DOI 10.1109/TAFFC.2020.2980275, 10.1109/TAFFC.2020.2980275;POGGI, 2007, MIND HANDS FACE BODY;RAMACHANDRAN A, 2019, ACM T INTERACT INTEL, V9, DOI 10.1145/3213768;RICH C, 2010, ACMIEEE INT CONF HUM, P375, DOI 10.1109/HRI.2010.5453163;RUDOVIC O, 2019, ICMI'19: PROCEEDINGS OF THE 2019 INTERNATIONAL CONFERENCE ON MULTIMODAL INTERACTION, P6, DOI 10.1145/3340555.3353742;SALAM H, 2015, 11 IEEE INT C WORKSH, V3, P1, DOI 10.1109/FG.2015.7284845, DOI 10.1109/FG.2015.7284845;SALAM H, 2017, IEEE ACCESS, V5, P705, DOI 10.1109/ACCESS.2016.2614525;SALAM H, 2015, INT CONF AFFECT, P341, DOI 10.1109/ACII.2015.7344593;SANGHVI J, 2011, ACMIEEE INT CONF HUM, P305, DOI 10.1145/1957656.1957781;SCHWARZ BB, 2000, COGNITION INSTRUCT, V18, P461, DOI 10.1207/S1532690XCI1804_2;SHARMA K, 2020, LAK20: THE TENTH INTERNATIONAL CONFERENCE ON LEARNING ANALYTICS & KNOWLEDGE, P480, DOI 10.1145/3375462.3375498;SIDNER CL, 2005, ARTIF INTELL, V166, P140, DOI 10.1016/J.ARTINT.2005.03.005;SZAFIR DANIEL, 2012, P SIGCHI C HUM FACT, DOI DOI 10.1145/2207676.2207679;WHITEHILL J, 2014, IEEE T AFFECT COMPUT, V5, P86, DOI 10.1109/TAFFC.2014.2316163;WOLTERS CA, 1996, LEARN INDIVID DIFFER, V8, P211, DOI 10.1016/S1041-6080(96)90015-1