ii This investigation explored how parent personality, division of labor, maternal gatekeeping, and child temperament predicted undermining coparenting. Parent characteristics were assessed during the third trimester of pregnancy. Parent and child characteristics were assessed at 3 months and at 1 year. Undermining coparenting was observed at 3 years. Couples in which fathers were higher on negative affect or higher on positive affect displayed more undermining coparenting. Families showed greater undermining coparenting if they divided household and child care tasks unevenly and perceived their child as difficult. Mothers’ encouragement of father involvement was associated with less undermining coparenting if parents perceived their child as difficult. There was a significant interaction between fathers’ depressive symptoms and child difficult temperament; couples who perceived their child as more difficult and in which fathers reported experiencing more depressive symptoms later exhibited higher levels of undermining coparenting. In general, child difficult temperament was not directly related to undermining coparenting, but moderated the association between other predictors and undermining coparenting. This study points to the need for further research into the role parents ’ and children’s characteristic play in influencing coparenting quality. iii

Increasing evidence indicates that normal and abnormal personality can be treated within a single structural framework. However, identification of a single integrated structure of normal and abnormal personality has remained elusive. Here, a constructive replication approach was used to delineate an integrative hierarchical account of the structure of normal and abnormal personality. This hierarchical structure, which integrates many Big Trait models proposed in the literature, replicated across a meta-analysis as well as an empirical study, and across samples of participants as well as measures. The proposed structure resembles previously suggested accounts of personality hierarchy and provides insight into the nature of personality hierarchy more generally. Potential directions for future research on personality and psychopathology are discussed. In recent years, there has been increasing consensus that normal and abnormal personality variation can be treated within a single, unified structural framework (Eysenck, 1994; O’Connor, 2002; Widiger & Costa, 1994). A variety of studies have indicated, for example, that personality structure is essentially the same in clin-ical and nonclinical samples (O’Connor, 2002), that normal and abnormal personality are strongly related at the etiologic level (Jang & Livesley, 1999; Markon, Krueger, Bouchard, & Gottes-man, 2002), and that abnormal personality can be modeled as extremes of normal personality variation (O’Connor & Dyce, 2001). Despite consensus about the possibility of describing normal and abnormal personality within a single structural framework, however, there is less consensus about what this structural frame-work might be. Although there is emerging consensus about the superordinate structure of normal personality (Goldberg, 1993), less consensus exists about a similar structure of abnormal per-sonality (Livesley, 2001). Delineating a unified superordinate structure across normal and abnormal domains of personality has been even more challenging. Empirical results have supported a variety of conclusions, and validity has been demonstrated for multiple structural models (e.g., Jang & Livesley, 1999; Markon et

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