A new 4-group model of attachment styles in adulthood is proposed. Four prototypic attachment patterns are defined using combinations of a person's self-image (positive or negative) and image of others (positive or negative). In Study 1, an interview was developed to yield continuous and categorical ratings of the 4 attachment styles. Intercorrelations of the attachment ratings were consistent with the proposed model. Attachment ratings were validated by self-report measures of self-concept and interpersonal functioning. Each style was associated with a distinct profile of interpersonal problems, according to both self-and friend-reports. In Study 2, attachment styles within the family of origin and with peers were assessed independently. Results of Study I were replicated. The proposed model was shown to be applicable to representations of family relations; Ss' attachment styles with peers were correlated with family attachment ratings.This article describes a new model of attachment styles in adulthood. Drawing on the theory of Bowlby (1973, 1980, 1982a), two types of internal working models are postulatedan internal model of the self and an internal model of others. Each internal model can be dichotomized as positive or negative to yield four theoretical attachment styles. This article summarizes the relevant childhood attachment literature, reviews recent work on adult attachment, describes the new model, and then presents two empirical studies designed to validate the proposed model.