Walum (2008)
In addition to oxytocin, vasopressin appears to play a role in both animal and human bonding - specifically, in monogamous behavior where an individual is committed to a single sexual partner. This study could be used for biological factors in relationships or on Paper 1 for a question on either the role of one gene or hormone. The Winslow (1993) study could be used on Paper 1 to answer questions about animal...