Jacquelyn A. Mattfeld, dean of East House, will leave Radcliffe in July to assume the position of Associate Dean of Student Affairs at M.I.T. Mrs. Mattfeld had served as director of financial aid from 1960-62.

In addition, in 1960, she was appointed a member of the faculty of music at Harvard. She has written several articles on music history.

Although women students at M.I.T. will be Mrs. Mattfeld's primary responsibility. She said that her duties have not been too rigidly defined. She hopes to do "whatever is necessary to bring into focus the Institute's new concern with its women."

Mrs. Mattfeld expects to work closely with the Association of Women Students, which will have to formulate rules and policy for the new women's dormitory opening in September.

The completion of the dormitory will mark "the first real opportunity the Institute has had to provide a well-arranged living group situation for its women students," according to Roland B. Greeley, Director of Admissions at M.I.T.

Frederick G. Fassett, Jr. dean of residence, explained that until now undergraduate women have lived in scattered Boston apartments. The new house, he said, will consolidate the whole group.

To M.I.T. women who fear that they may lose the independence to which they are accustomed, Fassett was reassuring. "I should hardly think that the new rules will be more stringent than rules at Radcliffe," he said.

Mrs. Mattfeld expects that her role at M.I.T. will necessarily be somewhat different from her role at Radcliffe because of the "long labs and heavy class commitments of science students." She will see her girls primarily during office hours. While at Radcliffe "the girls are always at my home."