The effects of maltreatment on children's emotion knowledge (e.g., recognition of facial cues for happy, sad, mad, scared, and surprised expressions), parent-and teacher-rated social and expressive behavior (e.g., aspects of emotion regulation such as emotional intensity, regulation of emotionally-driven behavior, and classroom social competence with peers such as conflict management), and hypothetical social problem-solving skills were examined in a sample of 45 preschool-aged, predominantly African-American preschoolers. Comparisons between maltreated, high-risk, and low-risk groups revealed no reliable differences in emotion knowledge, but several significant differences in hypothetical social problem-solving skills and in parent-and teacher-rated social and expressive behavior. Specifically, maltreated children were rated high on negative emotionality and emotional support-seeking at school, and they were rated low on supportseeking at home, instrumental action at home, problem-focused social problem-solving strategies, and conflict management. In general, teachers rated maltreated children as the least competent, low-risk children as intermediate, and high-risk children as the most competent.