This subseries consists of documents related to a 1977 study on marriages with outside sexual contacts that Latham conducted for a Sociology 484 class at California State University, Fullerton. The subjects of the study were couples in heterosexual marriages in which at least one of the partners engaged in homosexual activity outside of the marriage. Both partners completed a series of questionnaires about the marriage, including the Locke and Locke-Wallace Marital Adjustment Tests. Latham's hypothesis was that it is not necessarily the strength of a person's homosexual identity, but rather his or her change in self-concept from the time of marriage that determined his or her marital adjustment. The series includes the surveys from the study, and survey administration and data analysis information. The paper that Latham wrote on the study has not been located, but the data analysis information includes notes that describe the project.