Social exclusion decreases prosocial behavior.

In 7 experiments, the authors manipulated social exclusion by telling people that they would end up alone later in life or that other participants had rejected them. Social exclusion caused a substantial reduction in prosocial behavior. Socially excluded people donated less money to a student fund, were unwilling to volunteer for further lab experiments, were less helpful after a mishap, and cooperated less in a mixed-motive game with another student. The results did not vary by cost to the self or by recipient of the help, and results remained significant when the experimenter was unaware of condition. The effect was mediated by feelings of empathy for another person but was not mediated by mood, state self-esteem, belongingness, trust, control, or self-awareness. The implication is that rejection temporarily interferes with emotional responses, thereby impairing the capacity for empathic understanding of others, and as a result, any inclination to help or cooperate with them is undermined. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

It's the thought that counts: The role of hostile cognition in shaping aggressive responses to social exclusion.

Prior research has confirmed a casual path between social rejection and aggression, but there has been no clear explanation of why social rejection causes aggression. A series of experiments tested the hypothesis that social exclusion increases the inclination to perceive neutral information as hostile, which has implications for aggression. Compared to accepted and control participants, socially excluded participants were more likely to rate aggressive and ambiguous words as similar (Experiment 1a), to complete word fragments with aggressive words (Experiment 1b), and to rate the ambiguous actions of another person as hostile (Experiments 2-4). This hostile cognitive bias among excluded people was related to their aggressive treatment of others who were not involved in the exclusion experience (Experiments 2 and 3) and others with whom participants had no previous contact (Experiment 4). These findings provide a first step in resolving the mystery of why social exclusion produces aggression. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Logging on, bouncing back: An experimental investigation of online communication following social exclusion.

A majority of U.S. adolescents at least occasionally communicate on the Internet with unknown peers. This study tested the hypothesis that online communication with an unknown peer facilitates recovery from the acute aversive effects of social exclusion and examined whether this benefit may be greater for adolescents compared with young adults. A total of 72 young adults (mean age = 18.4 years) and 51 adolescents (mean age = 12.5 years) were randomly assigned to undergo a standardized laboratory induction of social inclusion or exclusion, followed by 12 min of either communication with an unfamiliar other-sex peer or solitary computer game play. Compared with solitary game play, instant messaging with an unfamiliar peer facilitated greater replenishment of self-esteem and perceived relational value among previously excluded adolescents and young adults. Online communication also resulted in greater reduction of negative affect among adolescents but not among young adults. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Social exclusion causes self-defeating behavior.

Four experiments tested the idea that social exclusion leads to (unintentionally) self-defeating behavior. Exclusion was manipulated by telling some people that they were likely to end up alone later in life. This randomly assigned feedback caused people to take irrational, self-defeating risks (Experiments 1 and 2), choose unhealthy, rather than healthy, behaviors (Experiment 3), and procrastinate longer with pleasurable activities rather than practicing for an upcoming test (Experiment 4). A control group, who heard that their future would be marred by frequent accidents, did not show these self-defeating patterns. Thus, the effect goes beyond just hearing bad news. Emotional distress did not significantly mediate these effects across 3 different mood measures. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Automatic emotion regulation after social exclusion: Tuning to positivity.

Nine experiments tested competing hypotheses regarding nonconscious affective responses to acute social exclusion and how such responses may relate to positive mental health. The results strongly and consistently indicated that acute social exclusion increased nonconscious positive affect. Compared to nonexcluded participants, excluded participants recalled more positive memories from childhood than did accepted participants (Experiment 1), gave greater weight to positive emotion in their judgments of word similarity (Experiments 2 and 3), and completed more ambiguous word stems with happy words (Experiments 4a and 4b). This process was apparently automatic, as participants asked to imagine exclusion overestimated explicit distress and underestimated implicit positivity (Experiment 3). Four final experiments showed that this automatic emotion regulation process was found among participants low (but not high) in depressive symptoms (Experiments 5 and 6) and among participants high (but not low) in self-esteem (Experiments 7 and 8). These findings suggest that acute exclusion sets in motion an automatic emotion regulation process in which positive emotions become highly accessible, which relates to positive mental health. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Multidimensional latent-construct analysis of children's social information processing patterns: Correlations with aggressive behavior problems.

Social information processing (SIP) patterns were conceptualized in orthogonal domains of process and context and measured through responses to hypothetical vignettes in a stratified sample of 387 children (50% boys; 49% minority) from 4 geographical sites followed from kindergarten through 3rd grade. Multidimensional, latent-construct, confirmatory factor analyses supported the within-construct internal consistency, cross-construct discrimination, and multidimensionality of SIP patterns. Contrasts among nested structural equation models indicated that SIP constructs significantly predicted children's aggressive behavior problems as measured by later teacher reports. The findings support the multidimensional construct validity of children's social cognitive patterns and the relevance of SIP patterns in children's aggressive behavior problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Desensitization to media violence: Links with habitual media violence exposure, aggressive cognitions, and aggressive behavior.

This study examined the links between desensitization to violent media stimuli and habitual media violence exposure as a predictor and aggressive cognitions and behavior as outcome variables. Two weeks after completing measures of habitual media violence exposure, trait aggression, trait arousability, and normative beliefs about aggression, undergraduates (N = 303) saw a violent film clip and a sad or a funny comparison clip. Skin conductance level (SCL) was measured continuously, and ratings of anxious and pleasant arousal were obtained after each clip. Following the clips, participants completed a lexical decision task to measure accessibility of aggressive cognitions and a competitive reaction time task to measure aggressive behavior. Habitual media violence exposure correlated negatively with SCL during violent clips and positively with pleasant arousal, response times for aggressive words, and trait aggression, but it was unrelated to anxious arousal and aggressive responding during the reaction time task. In path analyses controlling for trait aggression, normative beliefs, and trait arousability, habitual media violence exposure predicted faster accessibility of aggressive cognitions, partly mediated by higher pleasant arousal. Unprovoked aggression during the reaction time task was predicted by lower anxious arousal. Neither habitual media violence usage nor anxious or pleasant arousal predicted provoked aggression during the laboratory task, and SCL was unrelated to aggressive cognitions and behavior. No relations were found between habitual media violence viewing and arousal in response to the sad and funny film clips, and arousal in response to the sad and funny clips did not predict aggressive cognitions or aggressive behavior on the laboratory task. This suggests that the observed desensitization effects are specific to violent content. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

The detection of social exclusion: Evolution and beyond.

This article analyzes how humans detect threats to social inclusion. The authors begin by noting the likely evolutionary roots of (a) the human sensitivity to threats of both interpersonal and group exclusion and (b) the nature of the primitive system that humans developed for detecting such threats. The authors then propose seven generic classes of signals (hurting, avoiding, exploiting, deregulating, disengaging, differentiating, and slandering) that modern humans use in detecting exclusion and compare our taxonomy to prior empirical attempts to identify rejection cues. Finally, the authors offer a preliminary model of how the modern sociometer operates, emphasizing the importance of behavioral expectations and attribution processes, and discuss open questions suggested by our analysis. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Alone but feeling no pain: Effects of social exclusion on physical pain tolerance and pain threshold, affective forecasting, and interpersonal empathy.

Prior findings of emotional numbness (rather than distress) among socially excluded persons led the authors to investigate whether exclusion causes a far-reaching insensitivity to both physical and emotional pain. Experiments 1-4 showed that receiving an ostensibly diagnostic forecast of a lonesome future life reduced sensitivity to physical pain, as indicated by both (higher) thresholds and tolerance. Exclusion also caused emotional insensitivity, as indicated by reductions in affective forecasting of joy or woe over a future football outcome (Experiment 3), as well as lesser empathizing with another person's suffering from either romantic breakup (Experiment 4) or a broken leg (Experiment 5). The insensitivities to pain and emotion were highly intercorrelated. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of aggressive cartoons on children's aggressive play.

"The purpose of this study was to test the hypothesis that exposure to aggressive fantasy in an animated cartoon may intensify children's impulses to aggression. Subjects were 36 first grade children, 18 girls and 18 boys, of middle class origin. The intensity of the child's aggressive impulses were inferred from his responses to questions concerning desire to 'play with' or 'pop' a large yellow balloon held by a tester. The experimental findings clearly supported the major prediction." From Psyc Abstracts 36:04:4FF61M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effects of school-based intervention programs on aggressive behavior: A meta-analysis.

Research on the effectiveness of school-based programs for preventing or reducing aggressive behavior was synthesized with a meta-analysis. Changes in aggressive behavior between pretest and posttest were analyzed for developmental patterns and characteristics associated with differential effects. Control groups showed little change in aggressive behavior, but there were significant reductions among intervention groups. Most studies were conducted on demonstration programs; the few studies of routine practice programs showed much smaller effects. Among demonstration programs, positive outcomes were associated with a variety of study, subject, and intervention characteristics. Most notably, higher risk youth showed greater reductions in aggressive behavior, poorly implemented programs produced smaller effects, and different types of programs were generally similar in their effectiveness, other things equal. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of social exclusion in trauma survivors with posttraumatic stress disorder.

Trauma survivors with posttraumatic stress disorder (PTSD) often experience or report social stigmatization and isolation. Williams (2001) provided an experimental paradigm to assess behavioral effects of social exclusion. This paradigm (face-to-face version) has been applied in a 2 × 2 group × experimental condition design. Participants in the PTSD group (N = 16) and the nontraumatized control group (N = 25) were randomly assigned to an exclusion or inclusion condition. The results showed interaction effects for main psychopathological assessments (depression, anxiety, psychoticism) and expected main effects for the majority of outcome measures (psychopathology, well-being, belonging, and meaningful existence). The research concludes that a general assumption of elevated levels of self-perceived social exclusion in PTSD patients has to be considered in terms of differentiated psychopathological effects of exclusion. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Social exclusion and early-stage interpersonal perception: Selective attention to signs of acceptance.

Social exclusion can thwart people's powerful need for social belonging. Whereas prior studies have focused primarily on how social exclusion influences complex and cognitively downstream social outcomes (e.g., memory, overt social judgments and behavior), the current research examined basic, early-in-the-cognitive-stream consequences of exclusion. Across 4 experiments, the threat of exclusion increased selective attention to smiling faces, reflecting an attunement to signs of social acceptance. Compared with nonexcluded participants, participants who experienced the threat of exclusion were faster to identify smiling faces within a “crowd” of discrepant faces (Experiment 1), fixated more of their attention on smiling faces in eye-tracking tasks (Experiments 2 and 3), and were slower to disengage their attention from smiling faces in a visual cueing experiment (Experiment 4). These attentional attunements were specific to positive, social targets. Excluded participants did not show heightened attention to faces conveying social disapproval or to positive nonsocial images. The threat of social exclusion motivates people to connect with sources of acceptance, which is manifested not only in “downstream” choices and behaviors but also at the level of basic, early-stage perceptual processing. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Does social exclusion motivate interpersonal reconnection? Resolving the "porcupine problem."

Evidence from 6 experiments supports the social reconnection hypothesis, which posits that the experience of social exclusion increases the motivation to forge social bonds with new sources of potential affiliation. Threat of social exclusion led participants to express greater interest in making new friends, to increase their desire to work with others, to form more positive impressions of novel social targets, and to assign greater rewards to new interaction partners. Findings also suggest potential boundary conditions to the social reconnection hypothesis. Excluded individuals did not seem to seek reconnection with the specific perpetrators of exclusion or with novel partners with whom no face-to-face interaction was anticipated. Furthermore, fear of negative evaluation moderated responses to exclusion such that participants low in fear of negative evaluation responded to new interaction partners in an affiliative fashion, whereas participants high in fear of negative evaluation did not. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Anxious solitude and peer exclusion predict social helplessness, upset affect, and vagal regulation in response to behavioral rejection by a friend.

It was hypothesized that combined individual child vulnerability (anxious solitude) and interpersonal stress (peer exclusion) would predict the strongest responses to experimentally manipulated behavioral peer rejection. Results indicated that in a sample of 3rd graders (N = 160, 59% girls), anxious solitary excluded children displayed more behavioral manifestations of social helplessness before and after behavioral rejection, reported more feelings of rejection in anticipation of and reaction to behavioral rejection, and were observably more upset during behavioral rejection than were normative children. Moreover, affective responses to behavioral rejection mediated the relation between anxious solitary excluded status and behavioral manifestations of social helplessness. Furthermore, anxious solitary excluded children versus anxious solitary children demonstrated excessive suppression of vagal tone and more sustained acceleration in heart rate during the experiment. Results also indicated that affective, social–cognitive, and regulatory processes directly contributed to children’s responses to behavioral rejection. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Beat them or ban them: The characteristics and social functions of anger and contempt.

This article reports 3 studies in which the authors examined (a) the distinctive characteristics of anger and contempt responses and (b) the interpersonal causes and effects of both emotions. In the 1st study, the authors examined the distinction between the 2 emotions; in the 2nd study, the authors tested whether contempt could be predicted from previous anger incidents with the same person; and in the 3rd study, the authors examined the effects of type of relationship on anger and contempt reactions. The results of the 3 studies show that anger and contempt often occur together but that there are clear distinctions between the 2 emotions: Anger is characterized more by short-term attack responses but long-term reconciliation, whereas contempt is characterized by rejection and social exclusion of the other person, both in the short-term and in the long-term. The authors also found that contempt may develop out of previously experienced anger and that a lack of intimacy with and perceived control over the behavior of the other person, as well as negative dispositional attributions about the other person, predicted the emergence of contempt. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Gender differences in the negative affective priming of aggressive behavior.

The negative affective priming of aggression was examined across different aversive contexts (general stress exposure and frustration) with a laboratory aggression paradigm that measured the intensity of shocks participants delivered to a putative employee. Participants' emotional responses were gauged via startle eyeblink reactions and self-report mood ratings. Aside from gender differences in overall aggression, men but not women exposed to general stress showed significant increases in aggression across blocks. However, frustration produced increases in aggression in both genders. Although both genders showed robust startle increases during stress, startle activation was related to increases in aggression in men and decreases in aggression in women. These findings suggest that general stress and experiences of negative emotion trigger physical aggressive responses more strongly in men than in women. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relationship of TV viewing habits and aggressive behavior in children.

Information about TV habits, (a) length of time watched and (b) extent of violence in favorite programs, was obtained from 689 mothers and 522 fathers in individual interviews having to do with the psychosocial antecedents of aggressive behavior in their children. This information was related to ratings of aggressive behavior of 3rd-grade children made by their peers. It was found that there was a significant positive relationship between the violence ratings of favorite programs as reported by both mothers and fathers and aggressive behavior of boys as rated in school. Also there was a significant negative relation between total time watched by boys as reported by mothers and aggressive behavior. The results for fathers' reports in this latter case were in the same direction, although not significant. No consistent relationships were noted between girls' TV habits as reported by either mother or father and aggression as rated in school by the peers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of social exclusion on cognitive processes: Anticipated aloneness reduces intelligent thought.

Three studies examined the effects of randomly assigned messages of social exclusion. In all 3 studies, significant and large decrements in intelligent thought (including IQ and Graduate Record Examination test performance) were found among people told they were likely to end up alone in life. The decline in cognitive performance was found in complex cognitive tasks such as effortful logic and reasoning; simple information processing remained intact despite the social exclusion. The effects were specific to social exclusion, as participants who received predictions of future nonsocial misfortunes (accidents and injuries) performed well on the cognitive tests. The cognitive impairments appeared to involve reductions in both speed (effort) and accuracy. The effect was not mediated by mood. (PsycINFO Database Record (c) 2011 APA, all rights reserved)