The purpose of this study was to develop the Mucowski Typology inventory, to test the hypothetical constructs regarding adult children from alcoholic families (ACOAs) prouosed by Claudia Black. This was done in order to discriminate them from others who were not raised in families in which there was alcoholism present. The subjects used in this study included entering freshmen college students and volunteer ACOAs identified through the ACOA Networker. Data from the subjects' responses to the Mucowski Typology Inventory were factor analyzed to establish the structure of the instrument. Results showed that three of Black's hypothesized typologies emerged along with other factors which Wegscheider hypothesized in her typology. Additional factors, the Obstinate Naysayer, Avoider and Stabilizer, also appeared; the current researchers attempted to identify these additional types based upon role characteristics that emerged from the study.