Publications

2023
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
Levy, A., Enisman, M., Perry, A., & Kleiman, T. . (2023). Midfrontal theta as an index of conflict strength in approach-approach vs. Avoidance-avoidance conflicts. Social Cognitive and Affective Neuroscience. Retrieved from Publisher's VersionAbstract
The seminal theory of motivational conflicts distinguishes between approach–approach (AP-AP) conflicts, in which a decision is made between desirable alternatives, and avoidance–avoidance (AV-AV) conflicts, in which a decision is made between undesirable alternatives. The behavioral differences between AP-AP and AV-AV conflicts are well documented: abundant research showed that AV-AV conflicts are more difficult to resolve than AP-AP ones. However, there is little to no research looking into the neural underpinnings of the differences between the two conflict types. Here, we show that midfrontal theta, an established neural marker of conflict, distinguished between the two conflict types such that midfrontal theta power was higher in AV-AV conflicts than in AP-AP conflicts. We further demonstrate that higher midfrontal theta power was associated with shorter decision times on a single-trial basis, indicating that midfrontal theta played a role in promoting successful controlled behavior. Taken together, our results show that AP-AP and AV-AV conflicts are distinguishable on the neural level. The implications of these results go beyond motivational conflicts, as they establish midfrontal theta as a measure of the continuous degree of conflict in subjective decisions.
Azevedo, F., Pavlovic, T., ..,, Perry, A., ..,, Boggio, P. S., & Sampaio, W. M. . (2023). Social and moral psychology of COVID-19 across 69 countries. Scientific Data, 10(1), 272. Retrieved from Publisher's VersionAbstract
The COVID-19 pandemic has affected all domains of human life, including the economic and social fabric of societies. One of the central strategies for managing public health throughout the pandemic has been through persuasive messaging and collective behaviour change. To help scholars better understand the social and moral psychology behind public health behaviour, we present a dataset comprising of 51,404 individuals from 69 countries. This dataset was collected for the International Collaboration on Social & Moral Psychology of COVID-19 project (ICSMP COVID-19). This social science survey invited participants around the world to complete a series of moral and psychological measures and public health attitudes about COVID-19 during an early phase of the COVID-19 pandemic (between April and June 2020). The survey included seven broad categories of questions: COVID-19 beliefs and compliance behaviours; identity and social attitudes; ideology; health and well-being; moral beliefs and motivation; personality traits; and demographic variables. We report both raw and cleaned data, along with all survey materials, data visualisations, and psychometric evaluations of key variables.
2022
Pavlovic, T., Azevedo, F., De, K., Riaño-Moreno, J. C., ..,, Perry, A., Keudel, O., et al. (2022). Predicting attitudinal and behavioral responses to COVID-19 pandemic using machine learning. PNAS nexus, 1(3), 093. Retrieved from Publisher's VersionAbstract
At the beginning of 2020, COVID-19 became a global problem. Despite all the efforts to emphasize the relevance of preventive measures, not everyone adhered to them. Thus, learning more about the characteristics determining attitudinal and behavioral responses to the pandemic is crucial to improving future interventions. In this study, we applied machine learning on the multinational data collected by the International Collaboration on the Social and Moral Psychology of COVID-19 (N = 51,404) to test the predictive efficacy of constructs from social, moral, cognitive, and personality psychology, as well as socio-demographic factors, in the attitudinal and behavioral responses to the pandemic. The results point to several valuable insights. Internalized moral identity provided the most consistent predictive contribution—individuals perceiving moral traits as central to their self-concept reported higher adherence to preventive measures. Similar results were found for morality as cooperation, symbolized moral identity, self-control, open-mindedness, and collective narcissism, while the inverse relationship was evident for the endorsement of conspiracy theories. However, we also found a non-neglible variability in the explained variance and predictive contributions with respect to macro-level factors such as the pandemic stage or cultural region. Overall, the results underscore the importance of morality-related and contextual factors in understanding adherence to public health recommendations during the pandemic.
Rum, Y., Genzer, S., Markovitch, N., Jenkins, J., Perry, A., & Knafo-Noam, A. . (2022). Are there positive effects of having a sibling with special needs? Empathy and prosociality of twins of children with non-typical development. Child Development, 93(4), 1121-1128. Retrieved from Publisher's VersionAbstract
This study examined whether typically developing (TD) twins of non-TD children demonstrate enhanced empathy and prosociality. Of 778 Hebrew-speaking Israeli families who participated in a twin study, 63 were identified to have a non-TD child with a TD twin, and 404 as having both twins TD. TD twins of non-TD children (27% males) were compared to the rest of the cohort of TD children (46% males) on measures of empathy and prosociality. Participants were 11 years old. TD twins of non-TD children scored significantly higher than TD twins of TD children in a measure of cognitive empathy (d = .43). No differences were found in emotional empathy and prosociality. The specificity of the positive effect on cognitive empathy is discussed.
Dreyer, A. M., Michalke, L., Perry, A., Chang, E. F., Lin, J. J., Knight, R. T., & Rieger, J. W. . (2022). Grasp-specific high-frequency broadband mirror neuron activity during reach-and-grasp movements in humans. Cerebral Cortex. Retrieved from Publisher's VersionAbstract

Broadly congruent mirror neurons, responding to any grasp movement, and strictly congruent mirror neurons, responding only to specific grasp movements, have been reported in single-cell studies with primates. Delineating grasp properties in humans is essential to understand the human mirror neuron system with implications for behavior and social cognition. We analyzed electrocorticography data from a natural reach-and-grasp movement observation and delayed imitation task with 3 different natural grasp types of everyday objects. We focused on the classification of grasp types from high-frequency broadband mirror activation patterns found in classic mirror system areas, including sensorimotor, supplementary motor, inferior frontal, and parietal cortices. Classification of grasp types was successful during movement observation and execution intervals but not during movement retention. Our grasp type classification from combined and single mirror electrodes provides evidence for grasp-congruent activity in the human mirror neuron system potentially arising from strictly congruent mirror neurons.

Jospe, K., Genzer, S., Ong, D., Zaki, J., Soroker, N., & Perry, A. . (2022). Impaired empathic accuracy following damage to the left hemisphere. Biological Psychology, 172. Retrieved from Publisher's VersionAbstract
Failing to understand others accurately can be extremely costly. Unfortunately, events such as strokes can lead to a decline in emotional understanding. Such impairments have been documented in stroke patients and are widely hypothesized to be related to right-hemisphere lesions, as well as to the amygdala, and are thought to be driven in part by attentional biases, for example, less fixation on the eyes. Notably, most of the previous research relied on measurements of emotional understanding from simplified cues, such as facial expressions or prosody. We hypothesize that chronic damage to the left hemisphere could hinder empathic accuracy and emotion recognition in naturalistic social settings that require complex language comprehension, even after a patient regains core language capacities. To assess this notion, we use an empathic accuracy task and eye-tracking measurements with chronic stroke patients with either right (N = 13) or left (N = 11) hemispheric damage—together with aged-matched controls (N = 15)—to explore the patients’ understanding of others’ affect inferred from stimuli that separates audio and visual cues. While we find that patients with right-hemisphere lesions showed visual attention bias compared to the other two groups, we uncover a disadvantage for patients with left-hemisphere lesions in empathic accuracy, especially when only auditory cues are present. These results suggest that patients with left-hemisphere damage have long-lasting difficulties comprehending real-world complex emotional situations.
Genzer, S., Ong, D. C., Zaki, J., & Perry, A. . (2022). Mu rhythm suppression over sensorimotor regions is associated with greater empathic accuracy. Social Cognitive & Affective Neuroscience. Social Cognitive & Affective Neuroscience. Retrieved from Publisher's VersionAbstract
When people encounter others’ emotions, they engage multiple brain systems, including parts of the sensorimotor cortex associated with motor simulation. Simulation-related brain activity is commonly described as a ‘low-level’ component of empathy and social cognition. It remains unclear whether and how sensorimotor simulation contributes to complex empathic judgments. Here, we combine a naturalistic social paradigm with a reliable index of sensorimotor cortex-based simulation: electroencephalography suppression of oscillatory activity in the mu frequency band. We recruited participants to watch naturalistic video clips of people (‘targets’) describing emotional life events. In two experiments, participants viewed these clips (i) with video and sound, (ii) with only video or (iii) with only sound and provided continuous ratings of how they believed the target felt. We operationalized ‘empathic accuracy’ as the correlation between participants’ inferences and targets’ self-report. In Experiment 1 (US sample), across all conditions, right-lateralized mu suppression tracked empathic accuracy. In Experiment 2 (Israeli sample), this replicated only when using individualized frequency-bands and only for the visual stimuli. Our results provide novel evidence that sensorimotor representations—as measured through mu suppression—play a role not only in low-level motor simulation, but also in higher-level inferences about others’ emotions, especially when visual cues are crucial for accuracy.
Van Bavel, J. J., Cichocka, A., Capraro, V., ..,, Perry, A., ..,, Zwaan, R. A., et al. (2022). National identity predicts public health support during a global pandemic. Nature Communications, 13. Retrieved from Publisher's VersionAbstract
Changing collective behaviour and supporting non-pharmaceutical interventions is an important component in mitigating virus transmission during a pandemic. In a large international collaboration (Study 1, N = 49,968 across 67 countries), we investigated self-reported factors associated with public health behaviours (e.g., spatial distancing and stricter hygiene) and endorsed public policy interventions (e.g., closing bars and restaurants) during the early stage of the COVID-19 pandemic (April-May 2020). Respondents who reported identifying more strongly with their nation consistently reported greater engagement in public health behaviours and support for public health policies. Results were similar for representative and non-representative national samples. Study 2 (N = 42 countries) conceptually replicated the central finding using aggregate indices of national identity (obtained using the World Values Survey) and a measure of actual behaviour change during the pandemic (obtained from Google mobility reports). Higher levels of national identification prior to the pandemic predicted lower mobility during the early stage of the pandemic (r = −0.40). We discuss the potential implications of links between national identity, leadership, and public health for managing COVID-19 and future pandemics.
Choshen-Hillel, S., Sadras, I., Gordon-Hecker, T., Genzer, S., S, I., Gozal, D., Caruso, E. M., et al. (2022). Physicians prescribe fewer analgesics during night shifts than day shifts. Proceedings of the National Academy of Sciences, 119, e2200047119. Retrieved from Publisher's VersionAbstract
*shared senior author
Adequate pain management is one of the biggest challenges of the modern healthcare system. Physician perception of patient subjective pain, which is crucial to pain management, is susceptible to a host of potential biases. Here we explore the timing of physicians’ work as a previously unrecognized source of systematic bias in pain management. We hypothesized that during night shifts, sleep deprivation, fatigue, and stress would reduce physicians’ empathy for others’ pain, leading to underprescription of analgesics for patient pain relief. In study 1, 67 resident physicians, either following a night shift or not, performed empathy for pain assessment tasks and simulated patient scenarios in laboratory conditions. As predicted, following a night shift, physicians showed reduced empathy for pain. In study 2, we explored this phenomenon in medical decisions in the field. We analyzed three emergency department datasets from Israel and the United States that included discharge notes of patients arriving with pain complaints during 2013 to 2020 (n = 13,482). Across all datasets, physicians were less likely to prescribe an analgesic during night shifts (compared to daytime shifts) and prescribed fewer analgesics than generally recommended by the World Health Organization. This effect remained significant after adjusting for patient, physician, type of complaint, and emergency department characteristics. Underprescription for pain during night shifts was particularly prominent for opioids. We conclude that night shift work is an important and previously unrecognized source of bias in pain management, likely stemming from impaired perception of pain. We consider the implications for hospitals and other organizations employing night shifts.
Kassem, N., Rum, Y., & Perry, A. . (2022). To feel and talk in a language of conflict: Distinctive emotional experience and expression of bilinguals in a conflict area. Journal of Multilingual and Multicultural Development, 1-18. Retrieved from Publisher's VersionAbstract
Research conducted on emotionality in bilinguals suggests that language use modulates emotional expression. The current study examines bilingual disadvantaged minority members’ emotional experience and expression as shaped by the group relations in a conflict area. We hypothesised that, in general, greater emotionality will be found in one’s native language. Moreover, since the second language is imposed and acquired in a negative context, there may be differential effects on negative and positive language. A novel ecological paradigm was used: Twenty-eight Palestinian citizens of Israel were videotaped while recounting emotional stories in both Arabic (L1) and Hebrew (L2), resulting in 212 videos. Two studies followed: In Study 1 we compared participants’ emotional ratings (1a) and analyzed the content of emotional expression (1b). In Study 2, American participants rated emotional expressiveness. In Study 1, an interaction effect was found between language and valence, with less positive emotions and expressions in L2. In Study 2, a general difference in expressiveness was found in favour of L1. These studies show an effect of power disparities on the emotional load of the second language, thus highlighting the emotional costs of using a second language acquired in a conflict area.
2021
Llorens, A., Tzovara, A., Bellier, L., Bhaya-Grossman, I., Bidet-Caulet, A., Chang, W. K., ..,, et al. (2021). Gender bias in academia: A lifetime problem that needs solutions. Neuron, 109, 2047-2074. Retrieved from Publisher's VersionAbstract
Despite increased awareness of the lack of gender equity in academia and a growing number of initiatives to address issues of diversity, change is slow, and inequalities remain. A major source of inequity is gender bias, which has a substantial negative impact on the careers, work-life balance, and mental health of underrepresented groups in science. Here, we argue that gender bias is not a single problem but manifests as a collection of distinct issues that impact researchers’ lives. We disentangle these facets and propose concrete solutions that can be adopted by individuals, academic institutions, and society.
Weiblen, R., Mairon, N., Krach, S., & et al, . (2021). The influence of anger on empathy and theory of mind. PloS one, 16, e0255068. Retrieved from Publisher's VersionAbstract
Social cognition allows humans to understand and predict other people’s behavior by inferring or sharing their emotions, intentions and beliefs. Few studies have investigated the impact of one’s own emotional state on understanding others. Here, we tested the effect of being in an angry state on empathy and theory of mind (ToM). In a between-groups design we manipulated anger status with different paradigms in three studies (autobiographical recall (N = 45), negative feedback (N = 49), frustration (N = 46)) and checked how this manipulation affected empathic accuracy and performance in the EmpaToM. All paradigms were successful in inducing mild anger. We did not find the expected effect of anger on empathy or ToM performance but observed small behavioral changes. Together, our results validate the use of three different anger induction paradigms and speak for rather weak behavioral effects of mild state anger on empathy and ToM.
Israelashivili, J., & Perry, A. . (2021). Nuancing perspective: Feedback shapes the understanding of another’s emotion. Social Psychology, 52, 238-249. Retrieved from Publisher's VersionAbstract
Two experiments manipulated participants’ familiarity with another person and examined their performance in future understanding of that person’s emotions. To gain familiarity, participants watched several videos of the target sharing experiences and rated her emotions. In the Feedback condition, perceivers learned about the actual emotions the target felt. In the Control condition, perceivers completed identical recognition tasks but did not know the target’s own emotion ratings. Studies (N total= 398; one preregistered) found that the Feedback group was more accurate than the Control in future understanding of the target’s emotions. Results provide a proof-of-concept demonstration that brief preliminary learning about past emotional experiences of another person can give one a more accurate understanding of the person in the future.(PsycInfo Database Record (c) 2021 APA, all rights reserved.
2020
Mairon, N., Nahum, M., Stolk, A., Knight, R. T., & Perry, A. . (2020). Behavioral and EEG Measures Show no Amplifying Effects of Shared Attention on Attention or Memory. nature, 10(1), 8458. Retrieved from Publisher's VersionAbstract
Shared attention experiments examine the potential differences in function or behavior when stimuli are experienced alone or in the presence of others, and when simultaneous attention of the participants to the same stimulus or set is involved. Previous work has found enhanced reactions to emotional stimuli in social situations, yet these changes might represent enhanced communicative or motivational purposes. This study examines whether viewing emotional stimuli in the presence of another person influences attention to or memory for the stimulus. Participants passively viewed emotionally-valenced stimuli while completing another task (counting flowers). Each participant performed this task both alone and in a shared attention condition (simultaneously with another person in the same room) while EEG signals were measured. Recognition of the emotional pictures was later measured. A significant shared attention behavioral effect was found in the attention task but not in the recognition task. Compared to event-related potential responses for neutral pictures, we found higher P3b response for task relevant stimuli (flowers), and higher Late Positive Potential (LPP) responses for emotional stimuli. However, no main effect was found for shared attention between presence conditions. To conclude, shared attention may therefore have a more limited effect on cognitive processes than previously suggested.
Jospe, K., Genzer, S., klein Selle, N., Ong, D., Zaki, J., & Perry, A. . (2020). The contribution of linguistic and visual cues to physiological synchrony and empathic accuracy. Cortex, 132, 296-308. Retrieved from Publisher's VersionAbstract
There is an ongoing debate concerning the contribution of different aspects of empathy to achieving an accurate understanding of others. In this study, we aimed to better comprehend the roles of experience sharing and mentalizing using a modified empathic-accuracy task. We analyzed the unique contribution of each of these mechanisms with an explicit cognitive report as well as an affective physiological synchrony measurement. First, we recorded the emotional autobiographical stories told by participants (“targets”, N = 28). Then, the targets watched their own videos as their heart rate (HR) was measured, and they reported on both a continuous and a discrete emotion scale what they felt while relaying the story. Next, we collected HR data from new participants (“observers”, N = 72) as they similarly rated the targets’ valence and discrete emotional states. In order to test the contribution of sensorimotor cues and contextual cues to empathic accuracy, observers viewed some videos with audio, others without audio, and listened to a third set of only the audio. We hypothesized that empathic accuracy—a cognitive measure that is a proxy for mentalizing and is operationalized by the correlation between a target’s reported emotions and an observer’s inference of those emotions—would be greater when linguistic information is present. We also hypothesized that physiological synchrony, a proxy for experience sharing, would be greater in the video-only condition, which was limited to sensorimotor cues to infer the other’s emotional state. Indeed, we found that empathic accuracy was greater when auditory information was present, and that HR synchrony was more prevalent when visual cues were presented alone. Having both information streams together did not enhance accuracy, yet it was the only condition in which both behavioral empathic-accuracy measures correlated with HR synchrony. This study provides evidence that separate experience sharing and mentalizing pathways are active in the same task.
Rubinstein, O., Corem, N., Perry, A., Gold, M., & Shamay-Tsoory, S. . (2020). Different neural activations for an approaching friend versus stranger: Linking personal space to numerical cognition. Brain and Behaviour, 10, e01613. Retrieved from Publisher's VersionAbstract

Introduction

Typically, humans place themselves at a preferred distance from others. This distance is known to characterize human spatial behavior. Here, we focused on neurocognitive conditions that may affect interpersonal distances. The current study investigated whether neurocognitive deficiencies in numerical and spatial knowledge may affect social perception and modulate personal space.

Method

In an event-related potential (ERP) study, university students with developmental dyscalculia (DD) and typically developing control participants were given a computerized version of the comfortable interpersonal distance task, in which participants were instructed to press the spacebar when they began to feel uncomfortable by the approach of a virtual protagonist.

Results

Results showed that students with deficiencies in numerical and spatial skills (i.e., DD) demonstrated reduced variability in their preferred distance from an approaching friend. Importantly, DD showed decreased amplitude of the N1 wave in the friend condition.

Conclusion

These results suggest that people coping with deficiencies in spatial cognition have a less efficient allocation of spatial attention in the service of processing personal distances. Accordingly, the study highlights the fundamental role of spatial neurocognition in organizing social space.