Peer Victimization and Substance Use in Early Adolescence: Influences of Deviant Peer Affiliation and Parental Knowledge

Being the target of peer victimization contributes to alcohol and cigarette use during early adolescence. This 1-year longitudinal study extended the current literature by investigating the potential links between peer victimization and alcohol and cigarette initiation among a sample of 723 youths recruited from three middle schools in Southern China. We proposed a moderated mediation model to examine whether peer victimization is indirectly related to substance use via deviant peer affiliation, and whether the strength of this mediation is moderated by the level of parental knowledge for both genders. All participants self-reported using questionnaires to assess peer victimization, deviant peer affiliation, parental knowledge, and substance use. The results revealed that peer victimization was indirectly associated with increased alcohol use via deviant peer affiliation for both genders. However, deviant peer affiliation mediated the impact of peer victimization on trying cigarettes for only boys. Moreover, parental knowledge acted as a protective role for increases in alcohol use for girls, but not for boys. These findings highlight the potential role of deviant peer affiliation to explain the relationship between peer victimization and substance use, and provide important implications for addressing the adverse consequences of peer victimization.     

The effects of violent video games and shyness on individuals’ aggressive behaviors

The general aggression model (GAM) has suggested that the interaction between person factors (e.g., personality variables) and situation factors (e.g., playing violent video games [VVGs]) can increase individuals’ aggressive behaviors through their cognition (e.g., hostile attributions), affect (e.g., negative affect), and/or arousal. The present study employed a modified competitive reaction time task to test the effects of shyness, violent (vs. nonviolent) gameplay, and shyness on individuals’ positive–negative affect, hostile attributions, and aggressive behaviors. In addition, the present study also employed structural equation modeling (SEM) to test the mediation (by cognition and affect) and moderation (by shyness). Results showed that playing a VVG increased aggressive behaviors, negative affect, and hostile attributions primarily among shy participants. In addition, the results of SEM also revealed that this moderating role was mediated by negative affect and hostile attributions. The present study supported GAM and showed that individuals’ aggressive behaviors are differentially susceptible to VVGs, depending on their level of shyness in a “for bad and for worse” manner.     

Do children understand fraction addition?

Many children fail to master fraction arithmetic even after years of instruction. A recent theory of fraction arithmetic (Braithwaite, Pyke, & Siegler, 2017) hypothesized that this poor learning of fraction arithmetic procedures reflects poor conceptual understanding of them. To test this hypothesis, we performed three experiments examining fourth to eighth graders' estimates of fraction sums. We found that roughly half of estimates of sums were smaller than the same child's estimate of one of the two addends in the problem. Moreover, children's estimates of fraction sums were no more accurate than if they had estimated each sum as the average of the smallest and largest possible response. This weak performance could not be attributed to poor mastery of arithmetic procedures, poor knowledge of individual fraction magnitudes, or general inability to estimate sums. These results suggest that a major source of difficulty in this domain is that many children's learning of fraction arithmetic procedures develops unconstrained by conceptual understanding of the procedures. Implications for education are discussed.