Publications

In Preparation
Genzer, S., Rum, T., Kramer, U. M., & Perry, A. . (In Preparation). I see you: Seeing One's Partner during Emotional Communication Enhances the affective Experience and Promotes Prosocial Behavior. (under review). Retrieved from Publisher's VersionAbstract
In our digitally connected world, interpersonal interactions increasingly occur through online platforms offering varied information channels. This research investigates the unique contribution of visual cues to emotional communication, examining both cognitive and affective aspects. We categorize affective experiences into three domains and explore how visual feedback enhances each and promotes prosocial behavior. Across three ecological dyadic studies on Zoom (N = 710), findings show that while visual information does not significantly enhance emotion-assessment accuracy, it shapes the affective experience of communication. Visual cues increased perceptions of listening, togetherness, and empathy, primarily influencing storytellers' perceptions. Active engagement through body gestures and eye gaze proved crucial in fostering positive interactions, even in online settings. Visual feedback also enhanced prosocial behavior, suggesting that visual elements not only enhance the experience of “being seen,” but motivate altruistic actions as well. The results reveal a complex interplay between visual and auditory cues, with vocal responsiveness only partially compensating for absent visual feedback. These findings have significant implications for social relations in a digital world, as the absence or presence of visual cues can profoundly shape the outcomes of our social interactions.
Marciano, D., Setman-Shachar, S., Choshen-Hillel, S., & Perry, A. . (In Preparation). How agency shapes social preferences: Using mouse-tracking to reveal changes in cognitive conflict. (under review). Retrieved from Publisher's VersionAbstract
Inequity aversion is a fundamental social preference. Concern for others’ welfare is yet another fundamental social preference. What do people prefer when maximizing others’ welfare creates an inequality that disadvantages them? Prior research has shown that people’s preferences depend on their level of agency, that is, their control over the allocation. Behaviorally, agentic decision makers have been shown to be more likely to prefer allocations that give another person more than them, compared to non-agentic ones. However, the cognitive processes underlying this shift of preference remain unclear. Here, we used mouse-tracking and reaction times to investigate how agency shapes social preferences in such cases. We examined decision conflict, the level of conflict experienced in arriving at a given choice, as a way to uncover whether different underlying social preferences are at play when one has versus does not have agency. We predicted an interaction effect of agency and choice on conflict, where choosing the prosocial option would be associated with less conflict in the Agency condition compared to the No-Agency condition, and that the opposite would be true for the equitable option. In our task, on each of trial, participants were presented with two allocation options: an equitable option (e.g., 50 cents for self, 50 cents for other) and an inequitable and prosocial option, favoring the other participant over oneself (e.g., 50 cents for self, 70 cents for other). Agentic participants chose one option to be implemented, whereas non-agentic participants indicated their preference, knowing that the lab manager had already made the decision. In two studies (N = 586), including a preregistered one, an interaction effect emerged in both mouse trajectory and reaction time analyses. These results suggest that agency alters social preferences during the decision-making process, and challenge traditional inequity aversion models claiming that people inherently dislike inequitable outcomes. Granting agency may be a powerful tool for maximizing social welfare in situations where equity and prosocial behavior are at odds.
Rubin, M., Li, J. Z., Zimmerman, F., Ong, D. C., Goldenberg, A., & Perry, A. . (In Preparation). The Value of Perceiving a Human Response: Comparing Perceived Human versus AI-Generated Empathy. (under review). Retrieved from Publisher's VersionAbstract

In five preregistered studies (n = 3,471), we examined differences in perception of empathic responses thought to be AI-generated or written by humans, to further understand the value of human empathy. We provided participants with AI-generated empathic responses, while manipulating the responses’ perceived source to be written by humans or AI-generated. We measured participants’ perception of empathy in the response, as well as positive emotions, negative emotions and support felt following the response. We further tested whether thinking that a human response was edited by AI, or an AI response was edited by a human, influences these emotional reactions (studies 2 and 3). In study 3 we examined which aspects of the empathic response (understanding, sharing of emotions, caring) affect perceived empathy, depending on the perceived source. While all responses were rated positively, participants’ belief about any AI involvement reduced ratings of empathy, support and positive emotions. Specifically, emotional sharing and care had unique value when perceived as coming from humans. Lastly, to examine how much a human response is valued and why, we tested how long people are willing to wait for a human to respond (study 4) or even just read about (study 5) their emotional experience, compared to receiving an immediate AI response. There were no differences between the waiting times, with some participants willing to wait up to two years for a human to respond or just read about their experience. Choosing to wait was due to participants’ intuition that humans could better empathize with them compared to AI. Together, results suggest that people attribute greater emotional value to communication they believe to be human, as opposed to communication with an AI, or involving it. These differences may stem from humans’ unique potential to genuinely feel and care, which AI does not possess. These findings have broad implications regarding how to wisely implement AI in our social - emotional lives.

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2025
Kassem, N., Nir, N., Perry, A., & Halperin, E. . (2025). Intergroug Emotions in Intergroup Conflicts: Power Disparities Perspective. The Handbook of Social and Political Conflict, 31-45. Wiley Blackwell.Abstract

 

Intergroup emotions play an integral part in conflicts, as they shape both intragroup and intergroup behaviors. These emotions mobilize societies in favor of either war or peace (Cohen-Chen et al., 2014b; Halperin et al., 2011). Lines of research have demonstrated that discrete emotions have been associated with specific outcomes of war/peace processes (Gayer et al., 2009; Halperin et al., 2013; Spanovic et al., 2010). Based on the valence of the emotion, and later on the valence of the outcome associated with it (Cohen-Chen et al., 2020), emotions were divided into constructive and destructive emotions, regardless of the power status of the group, which remains an understudied factor. For example, anger has been considered a destructive emotion motivating violence, whereas empathy had been seen as a constructive emotion mobilizing support for peace (Cheung-Blunden & Blunden, 2008; Maoz & McCauley, 2005). In this chapter, we challenge the oversimplistic approach by offering a novel framework that incorporates group power status in the categorization of the instrumentality of emotions.

 

Previous literature shows that differing realities in asymmetrical conflict also influence group goals and interests (Leshem & Halperin, 2020). Both high- and low-power groups aim to end war and bloodshed, but power dynamics lead the high-power group to prioritize harmonious relationships and maintain the status quo and, thus, may oppose compromises. This approach safeguards privileges and minimizes resistance. Conversely, the disadvantaged group prioritizes justice, having endured unequal circumstances and seeking to change the status quo by their own means, such as collective action.

The main implication of the fact that high- and low-power groups in conflicts have different goals and aspirations is that, for each group, different emotions play different roles in promoting these goals and aspirations, and consequently, in mobilizing them toward war or peace. To address that complexity, we propose a novel theoretical framework in which these desirable goals have underlying emotions that could be categorized into three units: constructive, destructive, and differential emotions. This model serves as the foundation to develop adjusted intervention tools that take into account the group power status, thus better tackling inequality and fostering peace and social justice among groups in asymmetrical conflicts. For example, by considering the differential effect of anger depending on the power status of the group, intervention tools can be developed to help attain social equality by facilitating concessions among the advantaged and by fostering a quest for equality attainment among the disadvantaged.

Gordon-Hecker, T., Choshen-Hillel, S., Ben-Simon, E., Walker, M. P., Perry, A., & Gileles-Hillel, A. . (2025). Restless nights, cold hearts: Poor sleep causally blunts empathy . International Journal of Clinical and Health Psychology, 25(1), 100548. Retrieved from Publisher's VersionAbstract

Poor sleep is pervasive in modern society. Poor sleep is associated with major physical and mental health consequences, as well as with impaired cognitive function. Less is known about the relationship between sleep and emotional and interpersonal behavior. In this work, we investigate whether poor sleep impairs empathy, an important building block of human interaction and prosocial behavior. We aimed to capture the effects of poor sleep on the various aspects of empathy: trait and state, affect and cognition.

Study 1 (n = 155) assessed daily habitual sleep over several days, and global sleep quality in the past month. Participants who reported worse sleep quality exhibited lower empathic caring and perspective-taking traits. Study 2 (n = 347) induced a one-night disruption of sleep continuity to test a causal relationship between sleep and empathy. Participants in the sleep disrupted condition had to briefly wake up five times over the night, whereas the sleep-rested controls slept normally. In the next morning, participants’ empathy and prosocial intentions were assessed. Participants in the sleep disruption condition exhibited lower empathic sensitivity and less prosocial decision-making than sleep-rested controls.

The main contribution of this work is in providing a robust demonstration of the multi-faceted detrimental effects of poor sleep on trait and state empathy. Our findings demonstrate that poor sleep causally impairs empathic response to the suffering of others. These findings highlight the need for greater public attention to adequate sleep, which may impact empathy on a societal level.

Lehmann, M., Genzer, S., Kassem, N., Van Tongeren, D. R., & Perry, A. . (2025). Intellectual Humility Predicts Empathic Accuracy and Empathic Resilience . Personality and Social Psychology Bulletin. Retrieved from Publisher's VersionAbstract
Three preregistered studies (N = 533) investigated the relationship between intellectual humility (IH) and cognitive and emotional empathy. Study 1 (n = 212) revealed a positive association between IH and empathic accuracy (EA), especially toward the outgroup. Study 2 (n = 112) replicated the significant association between IH and EA. Study 3 (n = 209) employed a manipulation to enhance IH to demonstrate causality. We found evidence for an indirect effect, wherein the manipulation increased state IH, which was associated with greater EA. A mini meta-analysis revealed that, on average, individuals with higher levels of IH exhibit increased EA, showing a greater understanding of others’ emotional states. Moreover, IH predicts empathic resilience—buffering against personal distress while maintaining or increasing empathic concern for others. These findings highlight the positive influence of IH on empathy, emphasizing its potential for fostering deeper connections and better understanding in social interactions.
2024
Markovitch, N., Perry, A., & Kleiman, T. . (2024). Psychologists should study basic social cognition processes within the context of sexual interactions. Nature Communications psychology, 2, Article 116. Retrieved from Publisher's VersionAbstract
Research in psychology has long underscored the significance of contextual influence on social cognition processes and behavior. However, the exploration of sexual interactions as a unique context affecting these processes has largely been neglected by previous research, despite their prominent role in our daily lives and potentially consequential outcomes. We outline the relevance of various basic social cognition processes to sexual interactions and propose a line of research integrating theoretical insights and methodologies from social cognition research with those from sex and relationship research. We elaborate on theoretical and applied contributions to both fields
Israelashvili, J., & Perry, A. . (2024). Heterogeneous empathic reactions and their associations with adherence and prosocial behaviors during a pandemic. Current Psychology. Retrieved from Publisher's VersionAbstract
The present research utilized the backdrop of the COVID-19 pandemic as a case study to explore the motives driving individuals to adhere to recommended health standards. One month into the first lockdown and eight months before the availability of vaccinations, a large sample of 1,263 individuals completed measures of empathic concern and personal distress in response to a person who contracted the virus. In addition, we measured their COVID-related behaviors, relating to benefitting another person (i.e., donation), the self (i.e., physical hygiene), or both self and other (i.e., physical distancing). Consistent with the Empathy-Altruism Hypothesis (Batson et al., 2015), we found that individuals who experience higher empathic concern, maintain greater physical distance and physical hygiene and act more generously. We further found that individuals who experienced high personal distress were less likely to act generously, albeit more likely to maintain personal hygiene and physical distance. These findings suggest that compliance with health recommendations can be encouraged by eliciting empathic concern or personal distress. Yet, compliance per se is not prosocial behavior. Any intervention aiming to increase prosocial motivation should focus on enhancing empathic concern while minimizing personal distress.
Guzikevits, M., T Hecker, G. -, Rekhtman, D., Salameh, S., Perry, A., Gileles-Hillel, A. *, Choshen-Hillel, S. *, et al. (2024). Sex Bias in Pain Management Decisions. PNAS, 121(33), e2401331121. Retrieved from Publisher's VersionAbstract
In the pursuit of mental and physical health, effective pain management stands as a cornerstone. Here, we examine a potential sex bias in pain management. Leveraging insights from psychological research showing that females’ pain is stereotypically judged as less intense than males’ pain, we hypothesize that there may be tangible differences in pain management decisions based on patients’ sex. Our investigation spans emergency department (ED) datasets from two countries, including discharge notes of patients arriving with pain complaints (N = 21,851). Across these datasets, a consistent sex disparity emerges. Female patients are less likely to be prescribed pain-relief medications compared to males, and this disparity persists even after adjusting for patients’ reported pain scores and numerous patient, physician, and ED variables. This disparity extends across medical practitioners, with both male and female physicians prescribing less pain-relief medications to females than to males. Additional analyses reveal that female patients’ pain scores are 10% less likely to be recorded by nurses, and female patients spend an additional 30 min in the ED compared to male patients. A controlled experiment employing clinical vignettes reinforces our hypothesis, showing that nurses (N = 109) judge pain of female patients to be less intense than that of males. We argue that the findings reflect an undertreatment of female patients’ pain. We discuss the troubling societal and medical implications of females’ pain being overlooked and call for policy interventions to ensure equal pain treatment.
Shteynberg, G., Halpern, J., Sadovnik, A., Garthoff, J., Perry, A., Hay, J., & Fairweather, A. . (2024). Does it matter if empathic AI has no empathy?. Nature Machine Intelligence, 6, 496-497. Retrieved from Publisher's Version
Rubin, M., Arnon, H., Huppert, J. D., & Perry, A. . (2024). Considering The role of human empathy in AI-driven therapy. JMIR Mental Health, 11, e56529. Retrieved from Publisher's VersionAbstract
Recent breakthroughs in artificial intelligence (AI) language models have elevated the vision of using conversational AI support for mental health, with a growing body of literature indicating varying degrees of efficacy. In this paper, we ask when, in therapy, it will be easier to replace humans and, conversely, in what instances, human connection will still be more valued. We suggest that empathy lies at the heart of the answer to this question. First, we define different aspects of empathy and outline the potential empathic capabilities of humans versus AI. Next, we consider what determines when these aspects are needed most in therapy, both from the perspective of therapeutic methodology and from the perspective of patient objectives. Ultimately, our goal is to prompt further investigation and dialogue, urging both practitioners and scholars engaged in AI-mediated therapy to keep these questions and considerations in mind when investigating AI implementation in mental health.
Ben Adiva, Y., Genzer, S., & Perry, A. . (2024). Beyond Physical Sensations: Investigating Empathy and Prosocial Behavior in Vicarious-Pain Responders. Social Cognitive and Affective Neuroscience, 19(1), nsae039. Retrieved from Publisher's VersionAbstract

 

Empathy, the capacity to share others’ emotional experiences, has been proposed as a key motivation for altruistic behavior in both humans and animals. Sharing another’s emotional experience may generate a self-embodied simulation of their emotional state, fostering understanding and promoting prosocial behavior. Vicarious pain responders report sensing physical pain when observing others in pain. Whether this ability extends to emotional experiences remains unexplored. Using both questionnaires and ecologically valid behavioral tasks, we explored whether vicarious pain responders differ from nonresponders in empathic abilities and prosocial behavior. Participants watched video clips of people describing a negative emotional life event. We operationalized several empathic abilities and responses (empathic accuracy, affective synchrony, emotional reaction, and empathic motivation) based on participants’ and targets’ responses during and after watching the videos. Participants were also engaged in a donation task measuring tendency for prosocial behavior. Findings reveal that compared to nonresponders, vicarious pain responders exhibit enhanced empathic accuracy, intensified emotional reactions to others’ emotional pain, and a greater motivation to communicate with the target. This study marks the first behavioral evidence showcasing vicarious pain responders’ empathic abilities, reactions, and motivation in response to nonphysical pain of others, expanding our knowledge of this phenomenon and its association with broader empathic abilities.

Kassem, N., Halperin, E., & Perry, A. . (2024). Bonding versus Fragmentation: What Shapes Disadvantaged Intragroup Empathy in Advantaged Contexts. Group Processes & Intergroup Relations. Retrieved from Publisher's VersionAbstract

Abstract

Intragroup empathy is vital for resilience. However, it is often impaired in advantaged-dominated environments when one adopts advantaged-group characteristics to climb the social ladder. The current work examines contextual factors that may affect intragroup empathy: the motivation behind adopting the advantaged-group characteristics, and negative encounters with members of the advantaged group. We hypothesized that coercively, versus willingly, adopting advantaged-group characteristics will increase intragroup empathy both when the outcomes are negative and positive. We further hypothesized that a negative encounter with an advantaged-group member would increase intragroup empathy, compared to no encounter. In three studies, Palestinian students in Israeli academia were assigned to read scripts depicting the academic experience of a Palestinian student adopting advantaged-group characteristics. We tested (a) the effects of motivation following a negative outcome (N = 182); (b) the effects following a positive outcome (N = 205); and (c) the interaction between a negative encounter with an advantaged-group member and motivation, and its effect on intragroup empathy (N = 282). Intragroup empathy was higher in the coerced condition compared to the free-willing condition both for negative and positive outcomes. A negative encounter with an advantaged-group member increased intragroup empathy in the willing condition. By illuminating contextual variables that shape intragroup empathy, this research shows that impairment in intragroup empathy is not inevitable. This work may serve as a foundation for future interventions.

Gordon, T., Yaniv, I., Perry, A. *, & Choshen-Hillel, S. *. (2024). Empathy for the pain of others: Sensitivity to the individual, not to the collective. Journal of Experimental Social Psychology, 110, 104561. Retrieved from Publisher's VersionAbstract
Groups of people in pain evoke our empathic reactions. Yet how does one empathize with a group? Here, we aim to identify psychological mechanisms that underlie empathic reactions to groups. We theorize that because empathy is an egocentric process routed through the self, people are strongly attuned to the impact on each individual, and less so to the number of individuals affected. In five pre-registered experiments, involving different types of stimuli and valences of the outcomes, we repeatedly find that participants' level of empathy depends on the pain experienced by each individual, but not on the number of individuals in the group. The experiments support our hypothesis. They also add to alternative explanations such as psychophysical numbing and strategic regulation of negative emotions, providing valuable insights into the phenomenon of scope insensitivity. The findings also bear implications for the ongoing debate on the role of empathy in public policy decisions.
2023
Genzer, S., Ben Adiva, Y., & Perry, A. . (2023). Empathy: From Perception to Understanding and Feeling Others’ Emotions. In Elements in Perception. Cambridge University Press.Abstract
Empathy provides a cognitive and emotional bridge that connects individuals and promotes prosocial behavior. People empathize with others via two complementary perceptual routes: Cognitive Empathy or the ability to accurately recognize and understand others' emotional states, and Affective Empathy or the ability to 'feel with' others. This Element reviews past and current research on both cognitive and affective empathy, focusing on behavioral, as well as neuroscientific research. It highlights a recent shift towards more dynamic and complex stimuli which may capture better the nature of real social interaction. It expands on why context is crucial when perceiving others' emotional state, and discusses gender differences, biases affecting our understanding of others, and perception of others in clinical conditions. Lastly, it highlights proposed future directions in the field
Inbar, M., Genzer, S., Perry, A., Grossman, E., & Landau, A. N. . (2023). Intonation Units in spontaneous speech evoke a neural response. The Journal of Neuroscience, 43(48), 8189-8200. Retrieved from Publisher's VersionAbstract
Spontaneous speech is produced in chunks called intonation units (IUs). IUs are defined by a set of prosodic cues and presumably occur in all human languages. Recent work has shown that across different grammatical and sociocultural conditions IUs form rhythms of ∼1 unit per second. Linguistic theory suggests that IUs pace the flow of information in the discourse. As a result, IUs provide a promising and hitherto unexplored theoretical framework for studying the neural mechanisms of communication. In this article, we identify a neural response unique to the boundary defined by the IU. We measured the EEG of human participants (of either sex), who listened to different speakers recounting an emotional life event. We analyzed the speech stimuli linguistically and modeled the EEG response at word offset using a GLM approach. We find that the EEG response to IU-final words differs from the response to IU-nonfinal words even when equating acoustic boundary strength. Finally, we relate our findings to the body of research on rhythmic brain mechanisms in speech processing. We study the unique contribution of IUs and acoustic boundary strength in predicting delta-band EEG. This analysis suggests that IU-related neural activity, which is tightly linked to the classic Closure Positive Shift (CPS), could be a time-locked component that captures the previously characterized delta-band neural speech tracking.
Pan, H., Chen, Z., Jospe, K., Gao, Q., Sheng, J., Gao, Z., & Perry, A. . (2023). Mood congruency affects physiological synchrony but not empathic accuracy in a naturalistic empathy task. Biological Psychology, 184, 108720. Retrieved from Publisher's VersionAbstract
Empathy is a crucial aspect of our daily lives, as it enhances our wellbeing and is a proxy for prosocial behavior. It encompasses two related but partially distinct components: cognitive and affective empathy. Both are susceptible to context, biases and an individual’s physiological state. Few studies have explored the effects of a person’s mood on these empathy components, and results are mixed. The current study takes advantage of an ecological, naturalistic empathy task – the empathic accuracy (EA) task – in combination with physiological measurements to examine and differentiate between the effects of one’s mood on both empathy components. Participants were induced with positive or negative mood and presented videos of targets narrating autobiographical negative stories, selected from a Chinese empathy dataset that we developed (now publicly available). The stories were conveyed in audio-only, visual-only and full-video formats. Participants rated the target’s emotional state while watching or listening to their stories, and physiological measures were taken throughout the process. Importantly, similar measures were taken from the targets when they narrated the stories, allowing a comparison between participants’ and targets’ measures. We found that in audio-only and visual-only conditions, participants whose moods were congruent with the target showed higher physiological synchrony than those with incongruent mood, implying a mood-congruency effect on affective empathy. However, there was no mood effect on empathic accuracy (reflecting cognitive empathy), suggesting a different influence of mood on the two empathy components
Perry, A. . (2023). AI will never convey the essence of human empathy. Nature Human Behaviour, 7, 1808-1809. Retrieved from Publisher's VersionAbstract
Empathy generated by artificial intelligence (AI) is convincing and well received until recipients realize that it is artificial — a phenomenon that I term the ‘artificial-empathy paradox’. I explain this phenomenon by examining the three subcomponents of human empathy and the gaps between each of them and AI from the perspective of the empathy recipient. I propose that as AI revolutionizes much of our lives, empathy will persist as one of a few domains that are more highly valued in their human form. I argue that what seems to be a limitation of human empathizers — the fact that they are biological beings with finite energy resources for care and support — is why their empathy will surpass that of AI.
Mairon, N., Abramson, L., Knafo-Noam, A., Perry, A., & Nahum, M. . (2023). The relationship between empathy and executive functions among young adolescents. Developmental Psychology, 59(11), 2021-2036. Retrieved from Publisher's VersionAbstract
Empathy and executive functions (EFs) are multimodal constructs that enable individuals to cope with their environment. Both abilities develop throughout childhood and are known to contribute to social behavior and academic performance in young adolescents. Notably, mentalizing and EF activate shared frontotemporal brain areas, which in previous studies of adults led researchers to suggest that at least some aspects of empathy depend on intact EF mechanisms. Despite the substantial development that empathy and EF undergo during adolescence, no study to date has systematically examined the associations between components of empathy and EF in this age group. Here, we explore these associations using data from an online battery of tasks, collected as part of a longitudinal twin study (N = 593; Mage 11.09 ± 0.2; 53.46% female, Israeli adolescents from Jewish decent). Using a confirmatory factor analysis, we quantified the associations between the main components of empathy (mentalizing and interpersonal concern) and of EF (working memory [WM], inhibition and shifting [IaS]). We found that WM was related to both mentalizing and interpersonal concern, whereas IaS were related to mentalizing but not to interpersonal concern. We also discuss the genetic and environmental contributions to individual differences in each factor. Our findings show both similarities and differences from previous findings in adults, suggesting that the ongoing brain maturation processes and environmental age-dependent experiences in adolescence may affect the developing relation between cognitive and emotional development. These results have implications for better understanding and treating clinical populations demonstrating executive or emotional deficits, specifically during adolescence.
Petereit, P., Weiblen, R., Perry, A., & Krämer, U. M. . (2023). Effects of social presence on behavioral, neural, and physiological aspects of empathy for pain. Cerebral Cortex, 33(18), 9954-9970. Retrieved from Publisher's VersionAbstract
In mediated interactions (e.g. video calls), less information is available about the other. To investigate how this affects our empathy for one another, we conducted an electroencephalogram study, in which 30 human participants observed 1 of 5 targets undergoing painful electric stimulation, once in a direct interaction and once in a live, video-mediated interaction. We found that observers were as accurate in judging others' pain and showed as much affective empathy via video as in a direct encounter. While mu suppression, a common neural marker of empathy, was not sensitive to others' pain, theta responses to others' pain as well as skin conductance coupling between participants were reduced in the video-mediated condition. We conclude that physical proximity with its rich social cues is important for nuanced physiological resonance with the other's experience. More studies are warranted to confirm these results and to understand their behavioral significance for remote social interactions