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Exposure to peer aggression is a major risk factor for the development of aggressive behavior in childhood and adolescence. Furthermore, peer aggression has the propensity to spread and affect individuals who were not exposed to the original source of aggression. The aim of this paper is to demonstrate that peer aggression is in many regards similar to a contagious disease. By presenting a program of research based on longitudinal and multilevel studies, we provide evidence for the contagious quality of aggressive behavior, show that individuals vary in their susceptibility to peer aggression, and describe group‐level characteristics that moderate the influence of peer aggression. We discuss mechanisms that may explain how individuals catch aggressive behavior from their peers and how the effects on the development of individuals' aggressive behavior unfold over time. Further, we examine processes that may increase the risk of being exposed to peers' aggressive behavior. We conclude with discussing implications for future studies on the contagious nature of peer aggression.

In the present research we elaborate on an ecological account (Fiedler, Jung, Wänke & Alexopoulos, 2012) for the unitary distance dimension postulated in construal-level theory, highlighting linguistic influences on distance regulation. We first replicate that distinct action verbs solicit similarly distant or close episodes in many judges, producing strong positive correlations between ratings of four distance aspects (time, space, probability, personal distance). A primary semantic-pragmatic dimension that accounts for a large part of the verb impact is valence: Negative action verbs trigger more distant episodes than positive verbs. Experiment 1 rules out an alternative explanation in terms of participants' mood. Experiment 2 cross-validates the valence effect with a new sample of affective state verbs. Consistent with implicit verb causality, state verbs solicit more distant episodes than action verbs, suggesting lack of intentional control and power as another semantic-pragmatic dimension. Experiment 3 supports this interpretation using high-and low-power nouns.

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Abstract. This two-wave longitudinal study identified configurations of social rejection, affiliation with aggressive peers, and academic failure and examined their predictivity for reactive and proactive aggression in a sample of 1,479 children and adolescents aged between 9 and 19 years. Latent profile analysis yielded three configurations of risk factors, made up of a non-risk group, a risk group scoring high on measures of social rejection (SR), and a risk group scoring high on measures of affiliation with aggressive peers and academic failure (APAF). Latent path analysis revealed that, as predicted, only membership in the SR group at T1 predicted reactive aggression at T2 17 months later. By contrast, only membership in the APAF group at T1 predicted proactive aggression at T2.

Introduction: Although peers' acceptance of aggression is a major risk for the development of aggressive behavior, not all individuals who are situated within an aggression approving peer group engage in aggression. The present longitudinal study examined prosocial behavior as a moderator of the link between peers' acceptance of aggression and individual physical aggression. Methods: The study used two waves of data of a large longitudinal study conducted in Germany. Self-reports of 1663 male and female children and adolescents aged between 10 and 20 years were used as measures for physical aggression, peers' acceptance of aggression, and prosocial behavior. Results: Latent moderated structural equation modeling revealed significant main effects of peers' acceptance of aggression at T1 and prosocial behavior at T1 on aggressive behavior at T2. Most importantly, a significant interaction between both constructs indicated that the increase in individual aggression with peers' acceptance of aggression depended on participants' level of prosocial behavior. Applying the Johnson-Neyman technique, peers' acceptance of aggression was found to promote aggression only for participants with low levels of prosocial behavior, but not for moderately or highly prosocial individuals. Conclusions: The findings suggest that prosocial behavior has the propensity to attenuate the negative effect of peers' acceptance of aggression in the etiology of physical aggression in childhood and adolescence.

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In 2020, the COVID-19 pandemic impacted global life and transitioned economies and societal perceptions of life as we knew it. Professional and social life mostly ground to a nadir during the first lockdown in Europe in March. As a consequence, measures aimed at preventing the spread of the virus were established in medical facilities also and elective plastic surgery procedures were temporarily suspended in our clinic and others. A majority of the population, including those potentially contemplating plastic surgery procedures, spent most of their time at home with ample time available to research information about surgical procedures and other topics online. This investigation analyzes the relevance of plastic surgery during the pandemic on the basis of online search behavior patterns. Online traffic data from the online platform http://www.mooci.org were extracted using Google Analytics over a period of 6 months. The parameters analyzed were: pageviews, session duration, and bounce rate. Additionally, differentiation by areas of interest has been obtained. The data were compared and analyzed before and after the beginning of the first hard lockdown in Austria, Germany, and Switzerland. There were no significant differences in regard to pageviews and session duration when comparing time points before and after the beginning of the hard lockdown. The bounce rate exhibited a significant decrease after the beginning of the lockdown, implying a more conscious search for information and greater absorption and retention. There was no difference that could conclusively be attributed to the pandemic in terms of specific areas of interest researched. Society’s demand for information about plastic-surgical procedures continues to be steadily prevalent—despite, or even in particular, during a global pandemic. Providing reliable and readily available information about plastic surgery procedures is an important component of a functioning doctor–patient relationship and informed consent. This information may reflect society’s increased interest in plastic surgery during the pandemic, or be simply reflective of more spare time at hand to allow for such research. Further studies should investigate the relevance of elective procedures over the entire course of the pandemic.