Tolerating dissimilar other when primed with death: neural evidence of self-control engaged by interdependent people in Japan.

Mortality salience (MS) has been shown to lead to derogation of others with dissimilar worldviews, yet recent research has shown that Asian-Americans who presumably adopt an interdependent self-construal (SC) tend to reveal greater tolerance after MS induction. In the present study, we demonstrated that Japanese individuals who are high on interdependent SC indeed show greater tolerance toward worldview-threatening other in the MS (vs control) condition, thus replicating the prior research. Extending this research, we also found that interdependent people's tolerance toward worldview-threatening other was mediated by increased activity in the right ventrolateral prefrontal cortex in the MS condition. These data suggested that when exposed to death-related stimuli, highly interdependent individuals may spontaneously activate their neural self-control system which may serve to increase tolerance toward others.

Trait rejection sensitivity is associated with vigilance and defensive response rather than detection of social rejection cues.

Prior studies suggest that psychological difficulties arise from higher trait Rejection Sensitivity (RS)-heightened vigilance and differential detection of social rejection cues and defensive response to. On the other hand, from an evolutionary perspective, rapid and efficient detection of social rejection cues can be considered beneficial. We conducted a survey and an electrophysiological experiment to reconcile this seeming contradiction. We compared the effects of RS and Rejection Detection Capability (RDC) on perceived interpersonal experiences (Study 1) and on neurocognitive processes in response to cues of social rejection (disgusted faces; Study 2). We found that RS and RDC were not significantly related, although RS was positively related to perceived social rejection experiences and RDC was positively related to perceived social inclusion experiences. Event-related brain potentials (ERPs) revealed that higher RS was related to cognitive avoidance (i.e., P1) and heightened motivated attention (i.e., late positive potential: LPP), but not to facial expression encoding (i.e., N170) toward disgusted faces. On the other hand, higher RDC was related to heightened N170 amplitude, but not to P1 and LPP amplitudes. These findings imply that sensitivity to rejection is apparently distinct from the ability to detect social rejection cues and instead reflects intense vigilance and defensive response to those cues. We discussed an alternative explanation of the relationship between RS and RDC from a signal detection perspective.

Intrapersonal and interpersonal processes of social exclusion.

People have a fundamental need to belong with others. Social exclusion impairs this need and has various effects on cognition, affect, and the behavior of excluded individuals. We have previously reported that activity in the dorsal anterior cingulate cortex (dACC) and right ventrolateral prefrontal cortex (rVLPFC) could be a neurocognitive index of social exclusion (Kawamoto et al., 2012). In this article, we provide an integrative framework for understanding occurrences during and after social exclusion, by reviewing neuroimaging, electrophysiological, and behavioral studies of dACC and rVLPFC, within the framework of intrapersonal and interpersonal processes of social exclusion. As a result, we have indicated directions for future studies to further clarify the phenomenon of social exclusion from the following perspectives: (1) constructional elements of social exclusion, (2) detection sensitivity and interpretation bias in social exclusion, (3) development of new methods to assess the reactivity to social exclusion, and (4) sources of social exclusion.

Social exclusion induces early-stage perceptual and behavioral changes in response to social cues.

Social exclusion is so aversive that it causes broad cognitive and behavioral changes to regulate the individual's belonging status. The present study examined whether such changes also occur at early neural or automatic behavioral levels in response to social cues. Event-related brain potentials (ERPs) and facial electromyograms (EMGs) were recorded during a task in which participants viewed smiling, disgusted, and neutral faces after experiencing social exclusion or inclusion. Social exclusion was manipulated using a simple ball-tossing game (Cyberball), and need threat was assessed after the game. We found that zygomaticus major muscle activity, which reflects facial mimicry, was larger in response to smiling faces after exclusion than after inclusion. In addition, P1 amplitude, which reflects visual attention, was larger for disgusted faces than for neutral faces following social exclusion. N170 amplitude, which reflects structural encoding of the face, was correlated with heightened need threat. These findings demonstrate that social exclusion induces immediate and rapid changes in attention, perception, and automatic behavior. These findings reflect the rapid and primary regulation of belonging.

Non-conscious neural regulation against mortality concerns.

Social psychological studies have shown that an experience of threat such as an encounter with death-related stimuli and social exclusion results in tuning toward positive emotional information. Neuroimaging studies have also begun to uncover the neural basis of threat coping, and in this literature, the activity of the right ventrolateral prefrontal cortex (rVLPFC) has been suggested to play a key role in detection and regulation of threats. Using near-infrared spectroscopy (NIRS), we examined the activity of rVLPFC while participants were subliminally primed with the concept of "death" or the control concept "pain". We found greater rVLPFC activities relative to the prior baseline in the death prime condition, and furthermore, these activities negatively correlated with the evaluation of the positive (but not negative) essay. These data provide initial evidence to suggest that lesser neuronal regulation of threat, when it is first encountered, may lead to subsequent regulation by affect tuning.

[Asymmetric effect of in-group social values on identity with common-identity and common-bond in-groups].

Moderating effects of group type on the relationship between in-group social values and group identity were investigated. Previous research has indicated that values attached to the in-group, such as its status, privileges, and power, lead to increased group identity. However, these studies have not investigated the role of the type of in-groups on this effect. We conducted an experiment that manipulated the in-group type. In the common-identity type of in-group condition, formation of in- and out-groups on the basis of social categorization was established. In the common-bond type of in-group condition, interactions between the group members were conducted. Results indicated that in the former condition, the degree of in-group social values affected group identity; however, this effect was not found in the latter condition. These results suggest that social values of the in-group have an asymmetric effect on group identity, depending upon the in-group type as a common-identity or common-bond group.

Family socioeconomic status modulates the coping-related neural response of offspring.

Substantial research links economic adversity to poor coping in stressful or threatening environments. Neuroimaging studies suggest that activation of the right ventrolateral prefrontal cortex (rVLPFC) plays a key role in self-control, and it seems that individual differences in neurocognitive systems underlying self-control are determined in part by subjective childhood socioeconomic status (SES). The present study used near-infrared spectroscopy (NIRS) to investigate whether subjective childhood SES moderates rVLPFC activity during one form of threatening environment: social exclusion. Twenty-five undergraduates participated in a NIRS session in which they were socially included and then excluded during an online ball-tossing game. Lower subjective childhood SES was associated with higher levels of social distress and lower levels of rVLPFC activity during social exclusion. The present findings suggest that early family environments are reliably associated with deficits in offspring coping resources and processes, as well as with difficulties in regulating interpersonal circumstances.

Cognitive, Affective, and Motivational Changes during Ostracism: An ERP, EMG, and EEG Study Using a Computerized Cyberball Task.

Individuals are known to be highly sensitive to signs of ostracism, such as being ignored or excluded; however, the cognitive, affective, and motivational processes underlying ostracism have remained unclear. We investigated temporal changes in these psychological states resulting from being ostracized by a computer. Using event-related brain potentials (ERPs), the facial electromyogram (EMG), and electroencephalogram (EEG), we focused on the P3b amplitude, corrugator supercilii activity, and frontal EEG asymmetry, which reflect attention directed at stimuli, negative affect, and approach/withdrawal motivation, respectively. Results of the P3b and corrugator supercilii activity replicated findings of previous studies on being ostracized by humans. The mean amplitude of the P3b wave decreased, and facial EMG activity increased over time. In addition, frontal EEG asymmetry changed from relative left frontal activation, suggestive of approach motivation, to relative right frontal activation, indicative of withdrawal motivation. These findings suggest that ostracism by a computer-generated opponent is an aversive experience that in time changes the psychological status of ostracized people, similar to ostracism by human. Our findings also imply that frontal EEG asymmetry is a useful index for investigating ostracism. Results of this study suggest that ostracism has well developed neurobiological foundations.

[Examination of the self-control mechanism focusing on autonomous motivation and competence].

This study examined the self-control mechanism focusing on autonomous motivation and competence according to the self-control strength model. A laboratory experiment was conducted individually with 90 university students to investigate the impact of autonomous motivation and competence on self-control, and the effect of an interaction of autonomous motivation and competence on the depletion of self-control strength. The results showed that autonomous motivation and competence each had an impact on two important components of self-control: active goal pursuit and temptation resistance. Autonomous motivation influenced temptation resistance, and competence influenced active goal pursuit. Each factor had an exclusive role. Furthermore, the effect of their interaction influenced depletion of self-control strength by mechanisms indicating the different influences of each factor.

Is dorsal anterior cingulate cortex activation in response to social exclusion due to expectancy violation? An fMRI study.

People are typically quite sensitive about being accepted or excluded by others. Previous studies have suggested that the dorsal anterior cingulate cortex (dACC) is a key brain region involved in the detection of social exclusion. However, this region has also been shown to be sensitive to non-social expectancy violations. We often expect other people to follow an unwritten rule in which they include us as they would expect to be included, such that social exclusion likely involves some degree of expectancy violation. The present event-related functional magnetic resonance imaging (fMRI) study sought to separate the effects of expectancy violation from those of social exclusion, such that we employed an "overinclusion" condition in which a player was unexpectedly overincluded in the game by the other players. With this modification, we found that the dACC and right ventrolateral prefrontal cortex (rVLPFC) were activated by exclusion, relative to overinclusion. In addition, we identified a negative correlation between exclusion-evoked brain activity and self-rated social pain in the rVLPFC, but not in the dACC. These findings suggest that the rVLPFC is critical for regulating social pain, whereas the dACC plays an important role in the detection of exclusion. The neurobiological basis of social exclusion is different from that of mere expectancy violation.

Temporal distance insulates against immediate social pain: an NIRS study of social exclusion.

Social exclusion often evokes social pain in excluded individuals. Although this pain can trigger various interpersonal difficulties (e.g., aggression, depression), it is still unclear which psychological approach might best help to regulate social pain. However, recent work suggests that temporal distance helps to facilitate adaptive coping and self-control. The present study measured ventrolateral prefrontal cortex (VLPFC) activity during social exclusion, using near-infrared spectroscopy (NIRS) to examine the functional relationship between "temporal distance approach," or thinking about the distant future, and the social pain regulation process. Participants that imagined the distant future, next year, and beyond, felt less social pain and showed increased right (r)VLPFC activity during social exclusion, as compared to imagining events in the near future, such as tonight and tomorrow. Furthermore, rVLPFC activity mediated the relationship between temporal distance and social pain. On the basis of these findings, the effect of temporal distance on the process of adaptation after social exclusion is discussed. It is suggested that temporal distance moderates the process of regulating the impact of social exclusion.

Does higher general trust serve as a psychosocial buffer against social pain? An NIRS study of social exclusion.

Social exclusion evokes social pain in excluded individuals. Neuroimaging studies suggest that this social pain is associated with activation of the dorsal anterior cingulate cortex (dACC), with further regulation of social pain being reflected in activation of the right ventrolateral prefrontal cortex (rVLPFC). The present study focused on factors that influence activation of the rVLPFC during social exclusion. We conducted a near-infrared spectroscopy (NIRS) experiment to investigate whether two psychosocial resources (general trust and trait self-esteem) increase rVLPFC activity during social exclusion, thereby buffering against social pain. Thirty-seven undergraduates participated in an NIRS session in which they were socially rejected during an online ball-tossing game. Levels of general trust and trait self-esteem were negatively correlated with self-reported social pain in the exclusion conditions. Furthermore, general trust was positively correlated with rVLPFC activity, although there was no such relationship with self-esteem. rVLPFC activity mediated the relationship between general trust levels and social pain. The rVLPFC appears to be critical for the regulation of social pain. Taken together, these findings suggest that general trust and trait self-esteem probably have different impacts at different times over the course of a series of adaptive processes, all geared toward the modulation of social pain.

Does low self-esteem enhance social pain? The relationship between trait self-esteem and anterior cingulate cortex activation induced by ostracism.

According to sociometer theory, self-esteem serves as a barometer of the extent to which individuals are socially included or excluded by others. We hypothesized that trait self-esteem would be related to social pain responsiveness, and we used functional magnetic resonance imaging to experimentally investigate this potential relationship. Participants (n = 26) performed a cyberball task, a computerized game of catch during which the participants were excluded from the game. Participants then rated the degree of social pain experienced during both inclusion in and exclusion from the game. Individuals with lower trait self-esteem reported increased social pain relative to individuals with higher trait self-esteem, and such individuals also demonstrated a greater degree of dorsal anterior cingulate cortex activation. A psychophysiological interaction analysis revealed a positive connectivity between the dorsal anterior cingulate and prefrontal cortices for the lower trait self-esteem group, and a corresponding negative connectivity for the higher trait self-esteem group. Heightened dorsal anterior cortex activity and a corresponding connection with the prefrontal cortex might be one possible explanation for the greater levels of social pain observed experienced by individuals with low trait self-esteem.

Decreased ventral anterior cingulate cortex activity is associated with reduced social pain during emotional support.

People feel psychological pain when they are excluded, and this pain is often attenuated when emotional support is received. It is therefore likely that a specific neural mechanism underlies the detection of social exclusion. Similarly, specific neural mechanisms may underlie the beneficial effects of emotional support. Although neuroimaging researchers have recently examined the neural basis of social pain, there is presently no agreement as to which part of the anterior cingulate cortex (ACC) is involved in the perception and modulation of social pain. We hypothesized that activity in those brain regions that are associated with social pain would be correlated with decrements in social pain induced by emotional support. To examine the effects of emotional support on social pain caused by exclusion, we conducted an fMRI study in which participants played a virtual ball-tossing game. Participants were initially included and later excluded from the game. In the latter half of the session from which participants were excluded, participants received emotionally supportive text messages. We found that emotional support led to increased activity in the left lateral/medial prefrontal cortices and some temporal regions. Those individuals who experienced greater attenuation of social pain exhibited lower ventral ACC and higher left lateral prefrontal cortex activation. These results suggest that the ventral ACC underlies social pain, and that emotional support enhances prefrontal cortex activity, which in turn may lead to a weakened affective response.

[A longitudinal study of the relationship between support reciprocity and mental health among elementary and high school students].

At both the beginning and the end of a school year, 124 sixth-year elementary school students and 242 first-year high school students completed questionnaires regarding mutual support in friendships and stress responses. For elementary school students, support reciprocity did not correlate significantly with stress responses at either the beginning or end of the school year. For high school students, support reciprocity related significantly to stress responses at the end of the year but not at the beginning. These results suggest that the relationship between support reciprocity and mental health is influenced by the developing relationship between two people as well as the state of each individual's development at the time of mutual support.