Affect contagion: Physiologic covariation and linkage offer insight into socially shared thoughts, emotions, and experiences

Adler, 1994, Socioeconomic status and health: The challenge of the gradient, American Psychologist, 49, 15, 10.1037/0003-066X.49.1.15 Anderson, 2002, The experience of power: Examining the effects of power on approach and inhibition tendencies, Journal of Personality and Social Psychology, 83, 1362, 10.1037/0022-3514.83.6.1362 Ashton, 2003, Racial and ethnic disparities in the use of health services, Journal of General Internal Medicine, 18, 146, 10.1046/j.1525-1497.2003.20532.x Ayduk, 2010, From a distance: Implications of spontaneous self-distancing for adaptive self-reflection, Journal of Personality and Social Psychology, 98, 809, 10.1037/a0019205 Barrett, 2006, Solving the emotion paradox: Categorization and the experience of emotion, Personality and Social Psychology Review, 10, 20, 10.1207/s15327957pspr1001_2 Barrett, 2009, She's emotional. He's having a bad day: Attributional explanations for emotion stereotypes, Emotion, 9, 649, 10.1037/a0016821 Barrett, 1999, The structure of current affect: Controversies and emerging consensus, Current Directions in Psychological Science, 8, 10, 10.1111/1467-8721.00003 Barrett, 1998, Are women the “more emotional” sex? Evidence from emotional experiences in social context, Cognition & Emotion, 12, 555, 10.1080/026999398379565 Barrett, 2019, Emotional expressions reconsidered: Challenges to inferring emotion from human facial movements, Psychological Science in the Public Interest, 20, 1, 10.1177/1529100619832930 Bartz, 2011, Social effects of oxytocin in humans: Context and person matter, Trends in Cognitive Sciences, 15, 301 Baumeister, 2001, Bad is stronger than good, Review of General Psychology, 5, 323, 10.1037/1089-2680.5.4.323 Ben-Naim, 2013, An experimental study of emotion regulation during relationship conflict interactions: The moderating role of attachment orientations, Emotion, 13, 506, 10.1037/a0031473 Berntson, 1991, Autonomic determinism: The modes of autonomic control, the doctrine of autonomic space, and the laws of autonomic constraint, Psychological Review, 98, 459, 10.1037/0033-295X.98.4.459 Berntson, 1993, Cardiac psychophysiology and autonomic space in humans: Empirical perspectives and conceptual implications, Psychological Bulletin, 114, 296, 10.1037/0033-2909.114.2.296 Blascovich, 1993, Cardiovascular reactivity to psychological stress and disease: Conclusions, 225 Blascovich, 2002, Intergroup encounters and threat: A multi-method approach, 89 Blascovich, 2011 Bliss-Moreau, 2013, Macaque cardiac physiology is sensitive to the valence of passively viewed sensory stimuli, PLoS One, 8, 10.1371/journal.pone.0071170 Bourdieu, 1984 Brown, 2020, Emotional empathy in the social regulation of distress: A dyadic approach, Personality and Social Psychology Bulletin, 1 Brown, 2021, Emotional empathy in the social regulation of distress: A dyadic approach, Personality and Social Psychology Bulletin, 47, 1004, 10.1177/0146167220953987 Brownley, 2000, Cardiovascular psychophysiology, 224 Butler, 2011, Temporal interpersonal emotion systems: The “TIES” that form relationships, Personality and Social Psychology Review, 15, 367, 10.1177/1088868311411164 Butler, 2003, The social consequences of expressive suppression, Emotion, 3, 48, 10.1037/1528-3542.3.1.48 Cacioppo, 2000, The psychophysiology of emotion, 173 Cameron, 2022, Motivated empathic choices, Advances in Experimental Social Psychology, 66, 191, 10.1016/bs.aesp.2022.04.005 Cardoso, 2014, A meta-analytic review of the impact of intranasal oxytocin administration on cortisol concentrations during laboratory tasks: Moderation by method and mental health, Psychoneuroendocrinology, 49, 161, 10.1016/j.psyneuen.2014.07.014 Cassano, 2007, Influence of gender on parental socialization of children's sadness regulation, Social Development, 16, 210, 10.1111/j.1467-9507.2007.00381.x Chaplin, 2005, Parental socialization of emotion expression: Gender differences and relations to child adjustment, Emotion, 5, 80, 10.1037/1528-3542.5.1.80 Chartrand, 2009, Human mimicry, Advances in Experimental Social Psychology, 41, 219, 10.1016/S0065-2601(08)00405-X Chen, 2021, Physiological linkage during shared positive and shared negative emotion, Journal of Personality and Social Psychology, 121, 1029, 10.1037/pspi0000337 Cheng, 2003, Self-monitoring without awareness: Using mimicry as a nonconscious affiliation strategy, Journal of Personality and Social Psychology, 85, 1170, 10.1037/0022-3514.85.6.1170 Coan, 2006, Lending a hand: Social regulation of the neural response to threat, Psychological Science, 17, 1032, 10.1111/j.1467-9280.2006.01832.x Cohen, 1937, Effect of pain on the heart rate of normal and schizophrenic individuals, Journal of General Psychology, 17, 273, 10.1080/00221309.1937.9918000 Coleman, 1956, Physiological evidence of rapport during psychotherapeutic interviews, Diseases of the Nervous System, 17, 71 Darrow, 1929, Differences in the physiological reactions to sensory and ideational stimuli, Psychological Bulletin, 26, 185, 10.1037/h0074053 Davis, 1983, The effects of dispositional empathy on emotional reactions and helping: A multidimensional approach, Journal of Personality, 51, 167, 10.1111/j.1467-6494.1983.tb00860.x de Rosnay, 2006, Transmission of social anxiety from mother to infant: An experimental study using a social referencing paradigm, Behaviour Research and Therapy, 44, 1165, 10.1016/j.brat.2005.09.003 Decety, 2004, The functional architecture of human empathy, Behavioral and Cognitive Neuroscience Reviews, 3, 71, 10.1177/1534582304267187 del Rosario, 2022 Dickerson, 2004, Acute stressors and cortisol responses: A theoretical integration and synthesis of laboratory research, Psychological Bulletin, 130, 355, 10.1037/0033-2909.130.3.355 DiMascio, 1957, Physiological correlates of tension and antagonism during psychotherapy: A study of “interpersonal physiology.”, Psychosomatic Medicine, 19, 99, 10.1097/00006842-195703000-00002 Dimberg, 1998, Rapid facial reactions to emotional facial expressions, Scandinavian Journal of Psychology, 39, 39, 10.1111/1467-9450.00054 Domes, 2013, Intranasal oxytocin increases covert attention to positive social cues, Psychological Medicine, 43, 1747, 10.1017/S0033291712002565 Dovidio, 2002, Implicit and explicit prejudice and interracial interaction, Journal of Personality and Social Psychology, 82, 62, 10.1037/0022-3514.82.1.62 Ekman, 1975 Epley, 2010, Mind perception, Vol. 1 Erber, 1984, Outcome dependency and attention to inconsistent information, Journal of Personality and Social Psychology, 47, 709, 10.1037/0022-3514.47.4.709 Feldman, 2010, Touch attenuates infants' physiological reactivity to stress, Developmental Science, 13, 271, 10.1111/j.1467-7687.2009.00890.x Feldman, 2011, Maternal and paternal plasma, salivary, and urinary oxytocin and parent–infant synchrony: Considering stress and affiliation components of human bonding, Developmental Science, 14, 752, 10.1111/j.1467-7687.2010.01021.x Field, 1998, Touch therapy effects on development, International Journal of Behavioral Development, 22, 779, 10.1080/016502598384162 Field, 1989, Sharing and synchrony of behavior states and heart rate in nondepressed versus depressed mother-infant interactions, Infant Behavior & Development, 12, 357, 10.1016/0163-6383(89)90044-1 Fischer-Shofty, 2013, Oxytocin facilitates accurate perception of competition in men and kinship in women, Social Cognitive and Affective Neuroscience, 8, 313, 10.1093/scan/nsr100 Fletcher, 2010, Through the eyes of love: Reality and illusion in intimate relationships, Psychological Bulletin, 136, 627, 10.1037/a0019792 Frable, 1990, Marginal and mindful: Deviants in social interactions, Journal of Personality and Social Psychology, 59, 140, 10.1037/0022-3514.59.1.140 Fredrickson, 2000, The undoing effect of positive emotions, Motivation and Emotion, 24, 237, 10.1023/A:1010796329158 Frith, 2006, The neural basis of mentalizing, Neuron, 50, 531, 10.1016/j.neuron.2006.05.001 Funder, 1995, On the accuracy of personality judgment: A realistic approach, Psychological Review, 102, 652, 10.1037/0033-295X.102.4.652 Galinsky, 2003, From power to action, Journal of Personality and Social Psychology, 85, 453, 10.1037/0022-3514.85.3.453 Gamer, 2010, Different amygdala subregions mediate valence-related and attentional effects of oxytocin in humans, Proceedings of the National Academy of Sciences, 107, 9400, 10.1073/pnas.1000985107 Gottman, 1994, An agenda for marital therapy, 256 Grade, 2019, Attending surgeons differ from other team members in their perceptions of operating room communication, The Journal of Surgical Research, 235, 105, 10.1016/j.jss.2018.09.030 Granovetter, 1978, Threshold models of collective behavior, American Journal of Sociology, 83, 1420, 10.1086/226707 Gray, 2008, An in-group advantage in detecting intergroup anxiety, Psychological Science, 19, 1233, 10.1111/j.1467-9280.2008.02230.x Gregory, 1996, A nonverbal signal in voices of interview partners effectively predicts communication accommodation and social status perceptions, Journal of Personality and Social Psychology, 70, 1231, 10.1037/0022-3514.70.6.1231 Grewen, 2003, Warm partner contact is related to lower cardiovascular reactivity, Behavioral Medicine, 29, 123, 10.1080/08964280309596065 Gross, 1998, Antecedent-and response-focused emotion regulation: Divergent consequences for experience, expression, and physiology, Journal of Personality and Social Psychology, 74, 224, 10.1037/0022-3514.74.1.224 Gross, 2013, The emerging field of affective science, Emotion, 13, 997, 10.1037/a0034512 Grossman, 2007, Toward understanding respiratory sinus arrhythmia: Relations to cardiac vagal tone, evolution and biobehavioral functions, Biological Psychology, 74, 263, 10.1016/j.biopsycho.2005.11.014 Guastella, 2008, Oxytocin increases gaze to the eye region of human faces, Biological Psychiatry, 63, 3, 10.1016/j.biopsych.2007.06.026 Hardin, 1996, Shared reality: How social verification makes the subjective objective, Vol. 3, 28 Hertenstein, 2009, The communication of emotion via touch, Emotion, 9, 566, 10.1037/a0016108 Hibel, 2009, Intimate partner violence moderates the association between mother-infant adrenocortical activity across an emotional challenge, Journal of Family Psychology, 23, 615, 10.1037/a0016323 Hill-Soderlund, 2008, Parasympathetic and sympathetic responses to the strange situation in infants and mothers from avoidant and securely attached dyads, Developmental Psychobiology, 50, 361, 10.1002/dev.20302 Homer, 2013, Methamphetamine use and HIV in relation to social cognition, Journal of Health Psychology, 18, 900, 10.1177/1359105312457802 Hove, 2009, It's all in the timing: Interpersonal synchrony increases affiliation, Social Cognition, 27, 949, 10.1521/soco.2009.27.6.949 Hughes, 2010, Reciprocal relationships between parent and adolescent internalizing symptoms, Journal of Family Psychology, 24, 115, 10.1037/a0018788 Human, 2016, Interactive effects between extraversion and oxytocin administration: Implications for positive social processes, Social Psychological and Personality Science, 7, 735, 10.1177/1948550616644964 Israel, 2014, Oxytocin decreases accuracy in the perception of social deception, Psychological Science, 25, 293, 10.1177/0956797613500794 Jackman, 1979, The subjective meaning of social class identification in the United States, Public Opinion Quarterly, 43, 443, 10.1086/268543 Jacobson, 1930, Electrical measurements of neuromuscular states during mental activities: II. Imagination and recollection of various muscular acts, American Journal of Physiology-Legacy Content, 94, 22, 10.1152/ajplegacy.1930.94.1.22 Kanat, 2014, Oxytocin and the social brain: Neural mechanisms and perspectives in human research, Brain Research, 1580, 160, 10.1016/j.brainres.2013.11.003 Kassam, 2008, Cardiac vagal reactivity and dual-process reasoning, vol. 45, S30 Kelsey, 2002, Psychophysiological correlates of narcissistic traits in women during active coping, Psychophysiology, 39, 322, 10.1111/1469-8986.3930322 Kenny, 2006, Dyadic data analysis, Guilford Kim, 2011, Impairments of facial emotion recognition and theory of mind in methamphetamine abusers, Psychiatry Research, 186, 80, 10.1016/j.psychres.2010.06.027 Kirschbaum, 1994, Salivary cortisol in psychoneuroendocrine research: Recent developments and applications, Psychoneuroendocrinology, 19, 313, 10.1016/0306-4530(94)90013-2 Koslov, 2010 Kraus, 2009, Signs of socioeconomic status: A thin-slicing approach, Psychological Science, 20, 99, 10.1111/j.1467-9280.2008.02251.x Kraus, 2014, Sartorial symbols of social class elicit class-consistent behavioral and physiological responses: A dyadic approach, Journal of Experimental Psychology: General, 143, 2330, 10.1037/xge0000023 Kraus, 2017, Signs of social class: The experience of economic inequality in everyday life, Perspectives on Psychological Science, 12, 422, 10.1177/1745691616673192 Kreibig, 2007, Cardiovascular, electrodermal, and respiratory response patterns to fear- and sadness-inducing films, Psychophysiology, 44, 787, 10.1111/j.1469-8986.2007.00550.x Kring, 1998, Sex differences in emotion: Expression, experience, and physiology, Journal of Personality and Social Psychology, 74, 686, 10.1037/0022-3514.74.3.686 Kunda, 1996, Forming impressions from stereotypes, traits, and behaviors: A parallel-constraint-satisfaction theory, Psychological Review, 103, 284, 10.1037/0033-295X.103.2.284 Lakin, 2003, The chameleon effect as social glue: Evidence for the evolutionary significance of nonconscious mimicry, Journal of Nonverbal Behavior, 27, 145, 10.1023/A:1025389814290 Lammers, 2008, Illegitimacy moderates the effects of power on approach, Psychological Science, 19, 558, 10.1111/j.1467-9280.2008.02123.x Lang, 1983, Fear behavior, fear imagery, and the psychophysiology of emotion: The problem of affective response integration, Journal of Abnormal Psychology, 92, 276, 10.1037/0021-843X.92.3.276 Larsen, 2008, The psychophysiology of emotion, 180 Le, 2016, The costs of suppressing negative emotions and amplifying positive emotions during parental caregiving, Personality and Social Psychology Bulletin, 42, 323, 10.1177/0146167216629122 Ledermann, 2011, Assessing mediation in dyadic data using the actor-partner interdependence model, Structural Equation Modeling, 18, 595, 10.1080/10705511.2011.607099 Leschak, 2019, Two distinct immune pathways linking social relationships with health: Inflammatory and antiviral processes, Psychosomatic Medicine, 81, 711, 10.1097/PSY.0000000000000685 Levant, 2007, The normative male alexithymia scale: Measurement of a gender-linked syndrome, Psychology of Men & Masculinity, 7, 212, 10.1037/1524-9220.7.4.212 Levenson, 2011, Basic emotion questions, Emotion Review, 3, 379, 10.1177/1754073911410743 Levenson, 1983, Marital interaction: Physiological linkage and affective exchange, Journal of Personality and Social Psychology, 45, 587, 10.1037/0022-3514.45.3.587 Levenson, 1992, Empathy: A physiological substrate, Journal of Personality and Social Psychology, 63, 234, 10.1037/0022-3514.63.2.234 Low, 2019, Emotion regulation, conflict resolution, and spillover on subsequent family functioning, Emotion, 19, 1162, 10.1037/emo0000519 Lynn, 2014, Gender differences in oxytocin-associated disruption of decision bias during emotion perception, Psychiatry Research, 219, 198, 10.1016/j.psychres.2014.04.031 Mauss, 2005, The tie that binds? Coherence among emotion experience, behavior, and physiology, Emotion, 5, 175, 10.1037/1528-3542.5.2.175 McClintock, 1971, Menstrual synchrony and suppression, Nature, 229, 244, 10.1038/229244a0 Meltzoff, 1989, Imitation in newborn infants: Exploring the range of gestures imitated and the underlying mechanisms, Developmental Psychology, 25, 954, 10.1037/0012-1649.25.6.954 Mendes, 2009, Assessing the autonomic nervous system, 118 Mendes, 2013, Inspired by the question, not the measure: Exploiting neurobiological responses in the service of intergroup research, 299 Mendes, 2016, Emotion and the autonomic nervous system, 166 Mendes, 2013, Brittle smiles: Positive biases toward stigmatized and outgroup targets, Journal of Experimental Psychology: General, 142, 923, 10.1037/a0029663 Mendes, 2018, Affective responses as mediators of the relationship between stigma and health, 265 Mendes, 2014, Neurobiological concomitants of motivational states, 1, 233, 10.1016/bs.adms.2014.09.001 Mitkidis, 2015, Building trust: Heart rate synchrony and arousal during joint action increased by public goods game, Physiology & Behavior, 149, 101, 10.1016/j.physbeh.2015.05.033 Mittelmann, 1939, Affective states and skin temperature: Experimental study of subjects with “cold hands” and Raynaud's syndrome, Psychosomatic Medicine, 1, 271, 10.1097/00006842-193904000-00003 Muhtadie, 2015, Vagal flexibility: A physiological predictor of social sensitivity, Journal of Personality and Social Psychology, 109, 106, 10.1037/pspp0000016 Murray, 2008, Intergenerational transmission of social anxiety: The role of social referencing processes in infancy, Child Development, 79, 1049, 10.1111/j.1467-8624.2008.01175.x Muscatell, 2012, Social status modulates neural activity in the mentalizing network, NeuroImage, 60, 1771, 10.1016/j.neuroimage.2012.01.080 Néda, 2000, The sound of many hands clapping, Nature, 403, 849, 10.1038/35002660 Nolen-Hoeksema, 2012, Emotion regulation and psychopathology: The role of gender, Annual Review of Clinical Psychology, 8, 161, 10.1146/annurev-clinpsy-032511-143109 Palumbo, 2016, Interpersonal autonomic physiology: A systematic review of the literature, Personality and Social Psychology Review, 21, 99, 10.1177/1088868316628405 Papp, 2009, Mother-adolescent physiological synchrony in naturalistic settings: Within-family cortisol associations and moderators, Journal of Family Psychology, 23, 882, 10.1037/a0017147 Payer, 2008, Differences in cortical activity between methamphetamine-dependent and healthy individuals performing a facial affect matching task, Drug and Alcohol Dependence, 93, 93, 10.1016/j.drugalcdep.2007.09.009 Peters, 2016, The consequences of suppressing affective displays in romantic relationships: A challenge and threat perspective, Emotion, 16, 1050, 10.1037/emo0000202 Peters, 2014, Physiological and cognitive consequences of suppressing and expressing emotion in dyadic interactions, International Journal of Psychophysiology, 94, 100, 10.1016/j.ijpsycho.2014.07.015 Picton, 2000, Guidelines for using human event-related potentials to study cognition: recording standards and publication criteria, Psychophysiology, 37, 127, 10.1111/1469-8986.3720127 Porges, 2007, The polyvagal perspective, Biological Psychology, 74, 116, 10.1016/j.biopsycho.2006.06.009 Potvin, 2018, Cognitive deficits in individuals with methamphetamine use disorder: A meta-analysis, Addictive Behaviors, 80, 154, 10.1016/j.addbeh.2018.01.021 Richards, 2003, Emotion regulation in romantic relationships: The cognitive consequences of concealing feelings, Journal of Social and Personal Relationships, 20, 599, 10.1177/02654075030205002 Richeson, 2005, Brief report: Thin slices of racial bias, Journal of Nonverbal Behavior, 29, 75, 10.1007/s10919-004-0890-2 Rozin, 2001, Negativity bias, negativity dominance, and contagion, Personality and Social Psychology Review, 5, 296, 10.1207/S15327957PSPR0504_2 Seibt, 2015, Facial mimicry in its social setting, Frontiers in Psychology, 6, 10.3389/fpsyg.2015.01122 Shaffer, 2017, Unique contributions of emotion regulation and executive functions in predicting the quality of parent–child interaction behaviors, Journal of Family Psychology, 31, 150, 10.1037/fam0000269 Shelton, 2005, Intergroup contact and pluralistic ignorance, Journal of Personality and Social Psychology, 88, 91, 10.1037/0022-3514.88.1.91 Shelton, 2010, Concerns with appearing prejudiced: Implications for anxiety during daily interracial interactions, Group Processes and Intergroup Relations, 13, 329, 10.1177/1368430209344869 Shenhav, 2014, Aiming for the stomach and hitting the heart: Dissociable triggers and sources for disgust reactions, Emotion, 14, 301, 10.1037/a0034644 Siegel, 2018, Emotion fingerprints or emotion populations? A meta-analytic investigation of autonomic features of emotion categories, Psychological Bulletin, 144, 343, 10.1037/bul0000128 Singh, 2022, Cardiac risk stratification Sorce, 1985, Maternal emotional signaling: Its effect on the visual cliff behavior of 1-year-olds, Developmental Psychology, 21, 195, 10.1037/0012-1649.21.1.195 Spengler, 2017, Oxytocin facilitates reciprocity in social communication, Social Cognitive and Affective Neuroscience, 12, 1325, 10.1093/scan/nsx061 Stahl, 2010, Unraveling the effects of cultural diversity in teams: A meta-analysis of research on multicultural work groups, Journal of International Business Studies, 41, 690, 10.1057/jibs.2009.85 Stern, 2014, Circumventing anxiety during interpersonal encounters to promote interest in contact: An implementation intention approach, Journal of Experimental Social Psychology, 50, 82, 10.1016/j.jesp.2013.09.008 Strogatz, 2003 Suveg, 2016, Family stress moderates relations between physiological and behavioral synchrony and child self-regulation in mother–preschooler dyads, Developmental Psychobiology, 58, 83, 10.1002/dev.21358 Tamres, 2002, Sex differences in coping behavior: A meta-analytic review and an examination of relative coping, Personality and Social Psychology Review, 6, 2, 10.1207/S15327957PSPR0601_1 Tan, 2022 Thorson, 2018, Measuring physiological influence in dyads: A guide to designing, implementing, and analyzing dyadic physiological studies, Psychological Methods, 23, 595, 10.1037/met0000166 Thorson, 2021, Influencing the physiology and decisions of groups: Physiological linkage during group decision-making, Group Processes and Intergroup Relations, 24, 145, 10.1177/1368430219890909 Thorson, 2021, Physiological linkage among successful high-status women in international teams, Social Cognitive and Affective Neuroscience, 16, 167, 10.1093/scan/nsaa112 Thorson, 2021, Oxytocin increases physiological linkage during group therapy for methamphetamine use disorder: A randomized clinical trial, Scientific Reports, 11, 10.1038/s41598-021-99957-8 Timmons, 2015, Physiological linkage in couples and its implications for individual and interpersonal functioning: A literature review, Journal of Family Psychology, 29, 720, 10.1037/fam0000115 Unkelbach, 2020, Negativity bias, positivity bias, and valence asymmetries: Explaining the differential processing of positive and negative information, Advances in Experimental Social Psychology, 62, 115, 10.1016/bs.aesp.2020.04.005 Van Bavel, 2022, How neurons, norms, and institutions shape group cooperation, Advances in Experimental Social Psychology, 66, 59, 10.1016/bs.aesp.2022.04.004 Vyas, 2006, Constructing socio-economic status indices: How to use principal components analysis, Health Policy and Planning, 21, 459, 10.1093/heapol/czl029 Walden, 1988, The development of social referencing, Child Development, 59, 1230, 10.2307/1130486 Waters, 2014, Stress contagion: Physiological covariation between mothers and infants, Psychological Science, 25, 934, 10.1177/0956797613518352 Waters, 2017, Affect contagion between mothers and infants: Examining valence and touch, Journal of Experimental Psychology. General, 146, 1043, 10.1037/xge0000322 Waters, 2020, Keep it to yourself? Parent emotion suppression influences physiological linkage and interaction behavior, Journal of Family Psychology, 34, 784, 10.1037/fam0000664 Watts, 2002, A simple model of global cascades on random networks, Proceedings of the National Academy of Sciences, 99, 5766, 10.1073/pnas.082090499 Weisbuch, 2008, Affective divergence: Automatic responses to others' emotions depend on group membership, Journal of Personality and Social Psychology, 95, 1063, 10.1037/a0011993 Weissman, 2021, Correlation of sympathetic and parasympathetic nervous system activity during rest and acute stress tasks, International Journal of Psychophysiology, 162, 60, 10.1016/j.ijpsycho.2021.01.015 West, 2009, Superordinate identity and intergroup roommate friendship development, Journal of Experimental Social Psychology, 45, 1266, 10.1016/j.jesp.2009.08.002 West, 2014, Anxiety appraisal in intergroup interaction: When situational explanations backfire, Journal of Personality and Social Psychology, 107, 825, 10.1037/a0037941 West, 2017, Contagious anxiety: Anxious European Americans can transmit their physiological reactivity to African Americans, Psychological Science, 28, 1796, 10.1177/0956797617722551 Williams, 2013, Exploring patterns in cortisol synchrony among anxious and nonanxious mother and child dyads: A preliminary study, Biological Psychology, 93, 287, 10.1016/j.biopsycho.2013.02.015 Woolley, 2010, Evidence for a collective intelligence factor in the performance of human groups, Science, 330, 686, 10.1126/science.1193147 Woolley, 2017, Intranasal oxytocin increases facial expressivity, but not ratings of trustworthiness, in patients with schizophrenia and healthy controls, Psychological Medicine, 47, 1311, 10.1017/S0033291716003433 Zajonc, 1987, Convergence in the physical appearance of spouses, Motivation and Emotion, 11, 335, 10.1007/BF00992848 Zimmermann, 2014, Emotion regulation from early adolescence to emerging adulthood and middle adulthood: Age differences, gender differences, and emotion-specific developmental variations, International Journal of Behavioral Development, 38, 182, 10.1177/0165025413515405