This study examined parents' and children's descriptions of older and younger siblings' conflict goals in the late preschool and middle childhood years, and how these attributions were related to sibling relationship quality. Parents and 4- to 10-year-old children from 62 families were interviewed separately about siblings' motivations in two disputes and completed assessments of sibling relationship quality. Goal attributions varied across respondents in ways reflecting their family roles and positioning within disputes. Findings also revealed variations in the goals ascribed to older and younger siblings in line with hierarchical features of sibling relationships, such as younger siblings' conciliation/connectedness motives and older siblings' desires for autonomy/respect. Goal attributions were related to differences between families in the affective tenor of sibling relationships. Results demonstrate how power dynamics in sibling relationships play out in their everyday disputes, and underscore the importance of considering different family members' unique perspectives on children's sibling conflict experiences.