The doctoral program requires a master's degree in an appropriate field at an accredited institution; successful completion of a minimum of 23 credit hours above the master's degree; a written doctoral qualifying examination and a written comprehensive examination; completion of an approved dissertation in a selected area; and passing of an oral examination of the dissertation. Doctoral programs are arranged in close consultation with a faculty advisor. Coursework: The Ph.D. requires a minimum of 53 credit hours (typically 18 courses): For students with a Master of Science degree from another institution, 24 credits may transfer towards to doctoral degree, leaving a minimum of 29 credit hours (i.e., 10 courses) to be completed at Catholic University. For students with a Master of Science from Catholic University, 30 credits transfer towards doctoral study, leaving 23 addition credits (i.e., 8 courses) for the doctorate.