Parent versus child influences on differential parent warmth and discipline within twin pairs

Parenting behaviors have long been recognized as crucial to children's healthy development. However, examinations of the etiology of these behaviors are less prevalent. The current study investigated the driving forces behind parental warmth and discipline, particularly whether they are related more to traits within the parent or reactions to characteristics of the child. To explore this question, three robust factors of child temperament-effortful control, negative affectivity, and surgency/extraversion-and five parent personality traits were examined in association with parent behaviors through differential parenting within 185 four-year-old twin pairs (370 children; 56% girls; 90% White; predominantly middle class). Genetic analyses showed that parents tend to treat both children similarly in terms of parental warmth, but they treat children less similarly in terms of discipline, regardless of child zygosity. Multilevel linear regressions showed that within twin pairs, the child with higher effortful control received less discipline from parents than their cotwin. Analyses also showed that parent agreeableness was significantly related to parent warmth above and beyond other personality traits and child temperament. This study clarified the direction of effects and genetic contributions to parenting behaviors, supporting previous literature that discipline acts in reaction to the child, whereas warmth is more driven by parent personality. This research suggests the importance of focusing on child temperament and parent personality as they relate to parenting behaviors, allowing clinicians and parents to more effectively correct maladaptive parenting behaviors and encourage healthy and adaptive parenting behaviors, thus promoting positive outcomes for children. (PsycInfo Database Record (c) 2024 APA, all rights reserved).