Abstract: Transcranial Direct Current Stimulation (tDCS) has emerged as a promising tool for enhancing social cognition. The posterior cerebellum, which is part of the mentalizing network, has been implicated in social processes. In our combined tDCS-fMRI study, we investigated the effects of offline anodal cerebellar tDCS on activation in the cerebellum during social action prediction. Forty-one participants were randomly assigned to receive either anodal (2 mA) or sham (0 mA) stimulation over the midline of the posterior cerebellum for 20 min. Twenty minutes post stimulation, participants underwent a functional MRI scan to complete a social action prediction task, during which they had to correctly order randomly presented sentences that described either actions of social agents (based on their personality traits) or events of objects (based on their characteristics). As hypothesized, our results revealed that participants who received anodal cerebellar tDCS exhibited increased activation in the posterior cerebellar Crus 2 and lobule IX, and in key cerebral mentalizing areas, including the medial prefrontal cortex, temporo-parietal junction, and precuneus. Contrary to our hypotheses, participants who received anodal stimulation demonstrated faster responses to non-social objects compared to social agents, while sham participants showed no significant differences. We did not find a significant relationship between electric field magnitude, neural activation and behavioral outcomes. These findings suggest that tDCS targeting the posterior cerebellum selectively enhances activation in social mentalizing areas, while only facilitating behavioral performance of non-social material, perhaps because of a ceiling effect due to familiarity with social processing.

Abstract: Introduction Since intimacy is a fundamental human need within social relationships, and recognizing that a fear of intimacy correlates with various negative consequences, it becomes crucial to examine the origins and factors that contribute to addressing this issue. This research aimed to investigate the mediating roles of mentalization and integrative self-knowledge in the link between childhood trauma and the fear of intimacy. Methods Conducted as correlational descriptive research, our study incorporates a total sample of 303 adult women and men participants aged 20 to 50 in Tehran using the convenience sampling method. They completed the Fear of Intimacy Scale (FIS), the Childhood Trauma Questionnaire (CTQ), the Mentalization Scale (MentS), and the Integrative Self-Knowledge Scale (ISK). To analyze the research data at the descriptive level, frequency, percentage, standard deviation, and Pearson’s correlation coefficient were used, while path analysis tested our hypotheses in SPSS version 26 and AMOS version 24. Fit indices were used to check the model’s fit, and the mediation test was performed using the bootstrapping method. The fit indices revealed an excellent fit of the model with the data ( χ 2 = 1.51, χ 2/df = 1.51, p = 0.219; RMSEA = 0.05; SRMR = 0.02; CFI = 0.99; NFI = 0.99; TLI = 0.99). Results Results indicate mentalization fully mediates the childhood trauma-fear of intimacy relationship ( β = 0.14, p < 0.01). However, the indirect relationship between childhood trauma and fear of intimacy through integrative self-knowledge was insignificant. The results also showed that the path coefficient from mentalization to fear of intimacy was negative and significant ( β = −0.41, p < 0.001), while the path coefficient from integrative self-knowledge to fear of intimacy was not significant ( β = −0.02, p > 0.05). Discussion Based on the current findings indicating the complete mediation of mentalization and the insignificance of the mediation of integrative self-knowledge, we can deduce that enhancing the capacity for mentalization holds promise in effectively addressing intimacy-related issues. Overall, the study suggests mentalization effectively predicts the relationship between childhood trauma and fear of intimacy. This, in turn, may mitigate the detrimental effects of challenging childhood experiences on an individual’s ability to engage in intimacy and cultivate emotional closeness.

Abstract: Abstract The Islamist group ISIS has been particularly successful at recruiting Westerners as terrorists. A hypothesized explanation is their simultaneous use of two types of propaganda: Heroic narratives, emphasizing individual glory, alongside Social narratives, which emphasize oppression against Islamic communities. In the current study, functional MRI was used to measure brain responses to short ISIS propaganda videos distributed online. Participants were shown 4 Heroic and 4 Social videos categorized as such by another independent group of subjects. Persuasiveness was measured using post-scan predictions of recruitment effectiveness. Inter-subject correlation (ISC) was used to measure commonality of brain activity time courses across individuals. ISCs in ventral striatum predicted rated persuasiveness for Heroic videos, while ISCs in mentalizing and default networks, especially in dmPFC, predicted rated persuasiveness for Social videos. This work builds on past findings that engagement of the reward circuit and of mentalizing brain regions predicts preferences and persuasion. The observed dissociation as a function of stimulus type is novel, as is the finding that intersubject synchrony in ventral striatum predicts rated persuasiveness. These exploratory results identify possible neural mechanisms by which political extremists successfully recruit prospective members and specifically support the hypothesized distinction between Heroic and Social narratives for ISIS propaganda.

Abstract: Social–emotional development is a key factor in child well-being and development, and studying how it can be supported in early childhood is crucial. This study acted as a second trial testing the efficacy of a shared story book reading intervention combined with mentalizing discussions (SAGA), on children’s ( N = 196) social–emotional development. In contrast to the first trial, the current trial utilized a group comprised of mostly multilingual children, attending daycare in a minority language. In addition, we investigated the effect of the intervention on the mentalizing capacity of the staff. The staff of the early childhood education and care (ECEC) centers were trained to lead discussions about story characters’ mental states with children three times a week. The staff’s mentalization ability was measured by the self-reported Mentalization Scale (MentS). Children’s social–emotional development was evaluated via the teacher-reported Strengths and Difficulties Questionnaire SDQ, and verbal fluency via a subtest from the NEPSY II neuropsychological test battery. After 12 weeks, the children in the SAGA group showed improvement in prosocial behavior, whereas no change was observed in the control group. Furthermore, within the SAGA group, the children showing initially lower scores for prosocial behavior displayed larger improvement compared to their peers with higher scores at baseline. No such intervention-based improvement emerged in verbal fluency. Unlike in the first trial, the intervention did not have an impact on children’s internalizing or externalizing problems. The results suggest that story reading sessions combined with mentalizing discussions about emotions, thoughts, and intentions of the story characters may support children’s social–emotional development within the realm of prosocial behavior, although the possibility to decrease children’s internalizing and externalizing problems with these sessions remains unclear based on the two trials. In addition, training the ECEC staff in mentalization theory and guiding them toward mind-related dialogs improved staff motivation to mentalize, as well as their child-related mentalization capacity.

Abstract: In this article we describe the structure and technique of mentalization-based therapy for adolescents (MBT-A), an evidence-based intervention that has shown effectiveness in helping young people with self-harm, borderline personality, and depression. We describe also the differences between MBT with adults and MBT-A, which primarily focuses on the developmental aspects of adolescence. The developmental trajectory of adolescence culminates in a coherent and consolidated sense of self. Mentalizing provides the main supporting socio-cognitive-emotional process for achieving a coherent sense of self and, consequently, authentic and rewarding intimacy, making its evolutionary relevance clear and underscoring the importance of scaffolding this critical process during adolescence, regardless of diagnosis or therapeutic modality. We further argue that mentalization is a central mechanism by which personality functioning is achieved. In our view, mentalizing can be seen as a cross-diagnostic feature common to all personality pathology and, arguably, all psychopathology. This broadens the relevance of MBT-A beyond its original remit of self-harm and borderline personality disorder and identifies the enhancement of mentalizing and epistemic trust as a common factor in all psychotherapies that support adolescents through a challenging but critical developmental period. As such, mentalizing can be viewed as the property of all good psychotherapy.

Abstract: Action understanding involves two distinct processing levels that engage separate neural mechanisms: perception of concrete kinematic information and recognition of abstract action intentions. The mirror neuron system and the mentalizing system have both been linked to concrete action and abstract information processing, but their specific roles remain debatable. Here, we conducted a functional magnetic resonance imaging study with 26 participants who passively observed expected and unexpected actions. We performed whole-brain activation, region of interest, and effective connectivity analyses to investigate the neural correlates of these actions. Whole-brain activation analyses revealed that expected actions were associated with increased activation in the left medial superior frontal gyrus, while unexpected actions were linked to heightened activity in the left supramarginal gyrus, left superior parietal lobule, right inferior temporal gyrus, and left middle frontal gyrus. Region of interest analyses demonstrated that the left ventral premotor cortex exhibited greater activation during the observation of expected actions compared to unexpected actions, while the left inferior frontal gyrus, left superior parietal lobule, and left precuneus showed stronger activation during the observation of unexpected actions. Effective connectivity was observed between the left ventral premotor cortex and the left angular gyrus, left intraparietal sulcus, left dorsal premotor cortex, and left ventromedial prefrontal cortex with the middle frontal gyrus when observing unexpected, but not expected, actions. These findings suggest that expected actions are primarily processed by the mirror neuron system, whereas unexpected actions engage both the mirror neuron system and the mentalizing system, with these systems playing complementary roles in the understanding of unexpected actions.

Abstract: Abstract Resolving trauma may contribute to mental health and parenting in mother with histories of childhood maltreatment. The concept of trauma-specific reflective functioning (T-RF) was developed to assess the complexity of thought processes regarding trauma. The study aimed to validate the T-RF scale applied to the Trauma Meaning-Making Interview by examining its psychometric properties, associations with measures of trauma-processing strategies, maternal reflective functioning and mental health (depression and post-traumatic stress disorder [PTSD]), as well as evaluating whether T-RF offered a unique contribution to maternal insightfulness. Good construct validity of the T-RF scale was confirmed in a sample of 112 mothers with histories of childhood maltreatment using an independent coding system of trauma-processing. Better mentalization of trauma was prospectively associated with higher parental reflective functioning and mothers with high T-RF were much more likely to be insightful regarding the child’s mental states than non-reflective mothers and mothers with limited T-RF. The association between T-RF and insightfulness was observed even when controlling for maternal reflective functioning, trauma-processing strategies, maternal education and sociodemographic risk. T-RF was associated neither with depression, PTSD nor the characteristics of trauma. Findings suggest that mentalizing trauma would be an important protective factor in the intergenerational trajectories of trauma.

Abstract: It is now more than 30 years since Peter Fonagy published his classic 1991 paper introducing the concept of "mentalization" into the psychoanalytic literature, and in the period since then mentalization-based treatment (MBT) has emerged as an important therapeutic approach. In reviewing the history of this treatment, it is often assumed that MBT emerged at the interface between three domains: first, the developmental research on theory of mind; second, the clinical challenges of treating borderline personality disorder; and third, the empirical research on intergenerational patterns of attachment. This article suggests that there was one more domain, which was equally important to the development of MBT and which is perhaps less widely recognized. This fourth domain was developments in child analysis, especially those taking place during the late 1980s and early 1990s at the Anna Freud Centre in London. Although the origins of MBT theory and technique in child work is perhaps not widely acknowledged, recognizing these roots helps us to better understand mentalizing therapy. It also enables us to see how the development of MBT for children, young people, and families can be understood as a closing of the circle in the development of mentalization-based interventions.

Abstract: Abstract The present meta-analysis investigated the impact of non-invasive stimulation, using transcranial direct current stimulation (tDCS) and transcranial magnetic stimulation (TMS) targeting the posterior cerebellum, on social and emotional mentalizing about others. Prior research has convincingly shown that the posterior cerebellum supports social and emotional cognition. We identified 14 studies targeting the cerebellum with appropriate control conditions (i.e., sham, control site), which exclude general learning effects of the task or placebo effects. The studies included 29 task conditions where stimulation before or during a social or emotional task was applied on healthy samples. The results showed significant evidence that sustained anodal tDCS and TMS generally improved social and emotional performance after stimulation, in comparison with sham or control conditions, with a small effect size. In contrast, cathodal stimulation showed mixed facilitatory and inhibitory results. In addition, short TMS pulses, administered with the aim of interfering with ongoing social or emotional processes, induced a small but consistent inhibitory effect. Control tasks without social or emotional components also showed significant improvement after sustained anodal tDCS and TMS, suggesting that transcranial stimulation of the cerebellum may also improve other functions. This was not the case for short TMS pulses, which did not modulate non-social and non-emotional control tasks. Taken together, this meta-analysis shows that cerebellar neurostimulation confirms a causal role of the cerebellum in socio-emotional cognition, has a small but significant effect on improving socio-emotional skills, and may therefore have important clinical applications in pathologies where social and emotional cognition is impaired.

Abstract: Older adults have difficulties to detect the intentions, thoughts, and feelings of others, indicating an age-associated decline of socio-cognitive abilities that are known as "mentalizing". These deficits in mental state recognition are driven by neurofunctional alterations in brain regions that are implicated in mentalizing, such as the right temporo-parietal junction (rTPJ) and the dorso-medial prefrontal cortex (dmPFC). We tested whether focal transcranial current stimulation (tDCS) of the rTPJ and dmPFC has the potential to eliminate mentalizing deficits in older adults. Mentalizing deficits were assessed with a novel mindreading task that required the recognition of mental states in child faces. Older adults (n = 60) performed worse than younger adults (n = 30) on the mindreading task, indicating age-dependent deficits in mental state recognition. These mentalizing deficits were ameliorated in older adults who received sham-controlled andodal tDCS over the rTPJ (n = 30) but remained unchanged in older adults who received sham-controlled andodal tDCS over the dmPFC (n = 30). We, thus, showed for the first time that anodal tDCS over the rTPJ has the potential to remediate age-dependent mentalizing deficits in a region-specific way. This provides a rationale for exploring stimulation-based interventions targeting mentalizing deficits in older age.

Abstract: Introduction Poor mentalization, or lack of capacity to reflect on self and others in terms mental states, thoughts, and feelings, and time perspective biases were both related to mental disorders and lower wellbeing in separate studies. Expanding one prior study, we examined the relationship of mentalization and time perspective, including a measure known as deviations from the balanced time perspective (DBTP) that summarizes time perspective biases across the past, present, and future time frames. Method A convenience sample of 258 participants responded to a version of the Reflective Functioning Questionnaire (RFQ-8) and a six-dimensional version of the Zimbardo Time Perspective Inventory (S-ZTPI). Given recent evidence that the original two-factor structure of the RFQ may need to be reconsidered, we used confirmatory factor analyses (CFA) to compare alternative models for RFQ as a first step. Results In line with several recent studies, the CFA favored a unitary model of RFQ-8 reflecting hypomentalization (or uncertainty). The total score showed significant associations with Past Negative, Present Fatalistic, and Future Negative dimensions of S-ZTPI, while hypomentalization was negatively associated with Future Positive. Of major interest, DBTP and hypomentalization showed a strong positive correlation ( r = 0.64 for latent constructs; r = 0.62 in an adjusted model). Conclusion Deviations from the balanced time perspective were substantially related to hypomentalization. Further research is required to examine the generalizability of the finding (e.g., to measures of mentalization focused on others) and to provide a better understanding of the theoretical basis of the link. Potentially shared associations in development (e.g., attachment style) and mindfulness, that may influence both time perspective and mentalization is of interest in this regard.

Abstract: Research indicates that painful experiences can significantly affect the fear of cancer recurrence among cancer survivors, which is a distressing concern that influences both physiological and psychological recovery. Yet, the role of potential factors and mechanisms in these relationships is not fully known. This cross-sectional study aimed to advance our comprehension of the associa-tions between total pain and the fear of recurrence in post-treatment cancer patients by examining two potential mediators: psychological flexibility and mentalization. Three hundred and thirty-five participants (aged 22 to 88, 49.1% female) who had finished their cancer treatment completed self-report assessments of total pain, fear of recurrence, psychological flexibility, and mentalization. The serial mediation analysis showed that all dimensions of total pain were positively related to the fear of recurrence indirectly through psychological flexibility and mentalization, in serial. Additionally, gender moderated these serial mediational effects. In line with the psychological flexibility model, personal capacities to face difficult internal/external problems and interpret one’s behaviour in motivational terms can counterbalance patients’ negative emotions and feelings related to the illness.

Abstract: Microstates analysis of electroencephalography (EEG) has gained increasing attention among researchers and clinicians as a valid tool for investigating temporal dynamics of large-scale brain networks with a millisecond time resolution. Although microstates analysis has been widely applied to elucidate the neurophysiological basis of various cognitive functions in both clinical and non-clinical samples, its application in relation to socio-affective processing has been relatively under-researched. Therefore, the main aim of the current study was to investigate the relationship between EEG microstates and mentalizing (i.e., the ability to understand the mental states of others). Eighty-two participants (thirty-six men; mean age: 24.28 ± 7.35 years; mean years of education: 15.66 ± 1.80) underwent resting-state EEG recording and performed the Reading the Mind in the Eyes Test (RMET). The parameters of the microstates were then calculated using Cartool v. 4.09 software. Our results showed that the occurrence of microstate map C was independently and positively associated with the RMET score and contributed to the prediction of mentalizing performance, even when controlling for potential confounding variables (i.e., age, sex, education level, tobacco and alcohol use). Since microstate C is involved in self-related processes, our findings may reflect the link between self-awareness of one's own thoughts/feelings and the enhanced ability to recognize the mental states of others at the neurophysiological level. This finding extends the functions traditionally attributed to microstate C, i.e. mind-wandering, self-related thoughts, prosociality, and emotional and interoceptive processing, to include mentalizing ability.

Abstract: Abstract Parent–child informant discrepancies on psychopathology provide important knowledge on the parent–child relationship and the child’s mental health, but mechanisms underlying parent–child informant discrepancies are largely unknown. Therefore, we investigated the relationship between attachment problems and mentalizing capacity and parent–child informant discrepancies on borderline personality disorder (BPD) severity, internalizing, and externalizing pathology in a clinical sample of 91 adolescent girls with BPD and their parents. Results showed that more attachment problems to parents and peers were related to adolescents reporting more severe BPD than parents. Adolescents who described more internalizing symptoms relative to parents, reported more parental attachment problems, but enhanced peer attachment, suggesting those adolescents who do not feel recognized by their parents might turn to their friends. When parents rated adolescents higher on externalizing behaviors, the adolescent reported more attachment problems to parents and lower mentalizing capacity, indicating that this sub-group of adolescents may reflect less about how their behavior affects others.

Abstract: Mentalization – inferring other’s emotions and intentions – is crucial for human social interactions and is impaired in various brain disorders. While previous neuroscience research has focussed on static mentalization strategies, we know little about how the brain decides adaptively which strategies to employ at any moment of time. Here we investigate this core aspect of mentalization with computational modeling and fMRI during interactive strategic games. We find that most participants can adapt their strategy to the changing sophistication of their opponents, but with considerable individual differences. Model-based fMRI analyses identify a distributed brain network where activity tracks this mentalization-belief adaptation. Notably, the extent to which people update their belief about the other’s sophistication can be predicted out-of-sample from neural activity, providing a neural fingerprint of adaptive mentalization. Our approach illuminates the neural basis of mentalization ability and provides a new approach to assess these capabilities in healthy and clinical populations.

Abstract: Humans need to be on their toes when interacting with competitive others to avoid being duped. Too much caution out of context can, however, be detrimental and produce false beliefs of intended harm. Here, we offer a formal account of this phenomenon through the lens of Theory of Mind. We simulate agents of different depths of mentalization within a simple game theoretic paradigm and show how, if aligned well, deep recursive mentalization gives rise to both successful deception as well as reasonable skepticism. However, we also show that if a self is mentalising too deeply -hyper-mentalising - false beliefs arise that a partner is trying to trick them maliciously, resulting ina material loss to the self. This theory offers a potential cognitive mechanism for suspiciousness, paranoia, and conspiratorial ideation. Rather than a deficit in Theory of Mind, paranoia may arise from the application of overly strategic thinking to ingenuous behaviour.

Abstract: In this paper, we explore the rationale for a combined art therapy and mentalization-based treatment (MBT) group course for those experiencing a first episode of psychosis (FEP). We discuss the theoretical background for how art and MBT theory can help us better understand and work with groups of individuals experiencing FEP, particularly focusing on avoidance and insecure attachment styles. We outline the delivery of a ten-week psychoeducational Art MBT course within an Early Intervention in Psychosis (EIP) Service and discuss our experiential insights into this new modality as co-therapists. We conclude by proposing that art therapy and mentalizing practice together offer an accessible, useful and practical group structure for EIP services, which could improve individuals’ mentalizing capacity and overall social functioning.

Abstract: Abstract Background Mentalizing refers to the ability to understand one’s own and others’ mental states. Mentalizing is considered a key component of social cognition and healthy personality development. A multinational assessment tools able to appraise the multidimensional and multifaceted aspects of this complex construct are needed. Objective The present study had two aims: (a) validate an English version of the Multidimensional Mentalizing Questionnaire (MMQ, 33 items) which was designed to assess mentalizing based on an integrated and multilevel model of mentalizing; (b) explore the correlational relationships between the six dimensions of the MMQ and a set of sociodemographic, psycho-cognitive, mental health, and socio-functional variables. Methods Overall, 1823 individuals (age: 19–76 years old [M = 45; SD = 16]; sex: male = 48.51%, female = 50.57%, non-binary = 0.9%) participated in an online survey. While the participants came from 77 different countries, most of them were residents in UK and USA (95%). Data analytics include confirmatory factorial analysis and Pearson correlations. Results The CFA results validated the factorial structure of a 28-items MMQ-English version, with acceptable goodness of fit indices. Regarding the psychometric properties, the MMQ-English version showed good internal reliability and significant positive correlation with another scale designed to assess an analogue construct showing a fair convergent validity. The findings indicated that males, individuals with lower levels of education, lower socio-economic status, depressed, and with a higher score of loneliness are significantly more likely to report poor mentalizing compared with females, individuals with higher education level, greater SES, happier, and with lower scores of loneliness. Conclusion The present study validated the English version of the MMQ.

Abstract: This study used a naturalistic neuroscience method to examine relations between perspective, shared affect, social anxiety symptoms and neural similarity in mentalizing regions. Undergraduate students (N = 34, 85% White, 65% Women) came to the lab as platonic friend, same gender-identity pairs and engaged in a guided conversation while each of their views were recorded via mobile eye-trackers. Participants watched clips of the social interaction from both their own and their friend’s view while fMRI data were collected. After each clip, individuals rated their affect. Neural similarity was computed both in a classic sense (participants literally watched the same clip) and a perspective sense (participants both watched the self- or friend-view, making it the same moment but not the exact same clip). This created four conditions: Self Classic (self-view and friend’s friend-view), Friend Classic (friend-view and friend’s self-view), Self Perspective (self-view and friends’s self-view) and Friend Perspective (friend-view and friend’s friend-view). Participants self-reported their social anxiety symptoms and shared affect was computed from individual affect ratings. A multilevel model indicated that when dyads experienced more shared affect than their average, they exhibited more neural similarity during the Self Perspective compared to the Self Classic condition. Additionally, when dyads experienced less shared affect than their average, higher levels of social anxiety symptoms were related to more neural similarity during the Friend Perspective compared to the Self Classic condition. Our results suggest shared affect enhances neural similarity in social interactions and that social anxiety may alter this relation, potentially due to over-mentalizing.

Abstract: The aim of this article is twofold: firstly, to describe the seven-year analytic treatment of a TG adolescent (F "April" to M "Tran") and, secondly, based on the clinical observations, to propose a reflection on the intrapsychic events linked to gender transition. We could witness during this analysis that the dissonant anatomical sex, which is at the heart of the gender dysphoria, resists mentalization and consequently its psychological integration. The psychic events of transition, understood here on the model of a mourning process, could denote the various strategies necessary to the TG individual to negotiate the obstacle of mentalization.

Abstract: Objective: This study examines whether resilience and mentalizing capacities affect the network constellation of various protective and risk factors among psychotherapists during the COVID-19 pandemic. Method: A multinational sample of N = 536 psychotherapists completed surveys regarding their mentalizing capacity, general resilience, and therapist-specific resilience, as well as several other protective and risk factors. Network models of the latter factors were constructed, and global as well as local moderation analyses were conducted to examine their connectivity patterns. Results: At a global level, general and therapist-specific resilience, but not mentalizing certainty, increased absolute levels of network connectivity. At the local level, the two types of resilience specifically moderated the connections among protective factors by rendering them more positive; whereas mentalizing capacity moderated the connections between protective and risk factors by rendering them more negative. Conclusion: These findings suggest that (therapist-specific) resilience might be characterized by reinforcing links among protective factors, whereas mentalizing might be typified by weakening effects of risk factors––patterns which could prove useful for enhancing psychotherapists’ wellbeing during times of global but also personal crises.

Abstract: Mentalizing is a challenging cognitive process of inferring others' mental states through limited social information. To facilitate this process, individuals often use 'the self as proxy' strategy, namely social projection, characterized by self-other mergence (SOM). However, SOM can be also explained by simulation theory (ST) and theory theory (TT). To elucidate the neural mechanism underlying social projection, we incorporated a dyadic task involving inference of both the self's confidence (metacognition) and a partner's confidence (mentalizing) with fMRI. Our results revealed that SOM in mentalizing was associated with the self's confidence, irrelevant to the external cue, even though the neural representations of the external cue were overlapped between metacognition and mentalizing, which aligns with ST. Instead, neural activity in temporoparietal junction (TPJ) tracked the extent of SOM through an effective functional connectivity with dorsal anterior cingulate cortex (dACC) representing the self's confidence, while the partner's confidence was distinctively represented in dorsomedial prefrontal cortex (dmPFC), which aligns with TT. Critically, disruption of the TPJ activity by magnetic stimulation causally attenuated the SOM effect. Altogether, these findings suggest that social projection is distinct from ST and TT and the TPJ plays a pivotal role in mediating social projection during mentalizing.