Adult Sibling Relationship Questionnaire (ASRQ) is one of the most widely used sibling relationship scales. It consists of different dimensions of sibling relationships, including rivalry. The scale is typically used with young adolescents and beyond. The original ASRQ has 81 items, but a shortened 47-item version is also available, which is known as ASRQ-S. Both versions use a 5-point Likert scale, where 1 = "hardly at all" and 5 = "extremely much."