After graduating, he studied Yiddish with
Max Weinreich during the summer of 1948. During that time, he received a prize from the
YIVO (Institute for Yiddish Research) for a monograph on bilingualism. In 1953, he completed his Ph.D. in
social psychology at
Columbia University with a dissertation entitled
Negative Stereotypes Concerning Americans among American-born Children Receiving Various Types of Minority-group Education. From 1955 to 1958, he taught the sociology of language at the
City College of New York while he was also directing research at the
College Entrance Examination Board. In 1958, he was appointed an associate professor of human relations and psychology at Penn. He subsequently accepted a post as professor of psychology and sociology at
Yeshiva University in New York, where he would also serve as dean of the
Ferkauf Graduate School of Social Sciences and Humanities as well as academic vice president. In 1966, he was made
Distinguished University Research Professor of Social Sciences. In 1988, he became
professor emeritus and became affiliated with a number of other institutions: Visiting Professor and Visiting Scholar, School of Education, Applied Linguistics and Department of Linguistics,
Stanford University; Adjunct Professor of Multilingual and Multicultural Education, School of Education,
New York University; Visiting Professor of Linguistics,
City University of New York, Graduate Center. He has held visiting appointments and fellowships at over a dozen institutions around the world, including the
Center for Advanced Study in the Behavioral Sciences (
Stanford, CA) and the
Institute for Advanced Study (
Princeton, NJ). ==Impact==