Bachelor, College Wooster, Ohio, 1961. Master of Arts, Ohio State University, Columbus, 1964. Doctor of Philosophy, University Michigan, Ann Arbor, 1970.
Foreign expert Chiangmai University, Thailand, 1971—1975, Tianjin Foreign Language Institute, China, 1979. Assistant professor University Pittsburgh, 1976—1982. Professor applied linguistics San Francisco State University, since 1983.
Consultant, presenter in field.
Ordained elder United Presbyterian Church, since 1978. Member of Teachers English to Speakers Other Languages, International Neuropsychol. Society, American Association Applied Linguistics.
Married Janene Ann Nicodemus. Children: Derick, Christine.