“…Mothers completed standard reliable and valid questionnaires assessing their parenting behaviors and knowledge, including the Mother-Child Neglect Scale, 14 the Parent-Child Conflict Tactics Scales, 15 the Knowledge of Infant Development Inventory (D. L. MacPhee, unpublished manuscript and manual, 1981), the Parenting Sense of Competence Scale, 16 and the Survey of New Parents. 17 We scored the following 5 variables: positive parenting behaviors (7 items, e.g., “comforted infant”), negative parenting behaviors (10 items, e.g., “shouted at infant”), knowledge of infant development (10 items, e.g., “6-month-olds know what ‘No’ means”), parenting sense of competence (17 items, e.g., “being a parent makes me tense and anxious”), and father–infant relationship quality (whether the biological father was involved with the infant; 10 items, e.g., “hugs or shows physical affection toward child”).…”