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Abstract This meta-analysis of 70 studies of 33,089 Chinese students examines positive and negative parenting styles' relations with aggression, and their moderators. Children who experienced negative parenting styles showed more aggression, and those who experienced positive parenting styles showed less aggression. Both positive and negative parenting styles' links with aggression were larger (a) with parental emotional climate rather than parental socializing behaviours, (b) with self-reported rather than other-reported parenting styles, (c) with one aggression measure (BPAQ) than with others, (d) in Eastern China than in Central or Western China, and (e) for college students, smaller for senior high school students, and smallest for junior high school and primary school students. Negative parenting style's link with aggression was stronger (a) in Central China than in Western China and (b) for males than for females. Also, positive parenting style's link with aggression was larger for junior high school students than primary school students. Highlights • Strong evidence linking parenting style and aggression • This correlation was stronger among undergraduates and eastern group of China. • Strong correlation also seen among weaker elementary and middle school students. • Gender moderated the link between parenting style and aggression. [ABSTRACT FROM AUTHOR]

• Self-control is negatively correlated with aggression. • The relationship was stronger when the Aggression Questionnaire was used when compared to other measures of aggression. • The relationship was stronger among middle-school students and undergraduates when compared to elementary school students. • The relationship was stronger with all-male samples when compared to all-female samples. Although several theories argue that self-control is negatively related to aggression, studies show mixed results. Hence, our meta-analysis determined the overall relation between self-control and aggression (or their related measures) and moderation effects. Our data consists of 58 studies of 39,116 students in mainland China without physiological or psychological illnesses (effect sizes measured via r or equivalent). Self-control and aggression have a medium negative correlation. Moderator analysis showed that this correlation was stronger (a) among middle-school students and university undergraduates than among primary school students, (b) among samples with more males (rather than females), and (c) when using the Aggression Questionnaire rather than other aggression measures. Self-control measure and publication type did not moderate the link between self-control and aggression. Hence, self-control has a substantial negative link with aggression, moderated by age, gender, and aggression measure. [ABSTRACT FROM AUTHOR]