A genogram is a more detailed form of a family tree that contains behavioral patterns, descriptions of connection quality, individual attributes, historical facts, and other family dynamics. Depending on how much information you can gather on your entire family, it can cover two to three generations or more. Randy Gerson and Monica McGoldrick created genograms as part of their research in family therapy and clinical psychology. The book they published in 1985 went into great depth about it. Individuals can be characterized in the context of their entire family, including parents, siblings, parents, grandparents, and spouses, using this method.