This study compares results of the six major forms of marriage counseling: individual interview, individual group, concurrent interview, concurrent group, conjoint interview, and conjoint group. Data are from five different approaches in research methodology. The first, termed the Pilot Study, reviewed the outcome records of 773 former marriage counseling clients. The second, termed the Experimental Study, assigned 63 couples on a random basis, although balanced for severity, to the three most popular forms of marriage counseling: concurrent interview, conjoint interview, or conjoint group. It included a pre- to post-counseling test comparison involving the MMPI, CPI, Polyfactor Test for Marital Difficulties, and the Marital Adjustment Inventory. The third approach, the Quasi-Experimental Study, compared test results from two groups of couples with serious marital problems: the first group comprised seven couples who had been in three forms of counseling, while the second group included twenty-one couples who had been in only one form. The fourth approach, the Survey Study, used a questionnaire to measure reactions of 200 subjects who had just completed various forms of marriage counseling sessions. The fifth approach, the Poll Study, involved a mail survey of 209 former marriage counseling clients who had been terminated from varying forms of marriage counseling for from one to three years.