 Delta Psi Delta was established at Dartmouth College in 1950 as the Dartmouth chapter of Tau Epsilon Phi , a national fraternity . The Dartmouth chapter dissociated from the national in 1969 , and reformed itself as the Harold Parmington Foundation . Faced with falling membership in 1981 , the fraternity reformed itself with a more traditional Greek letter name , Delta Psi Delta , and opened its membership to women as well as men . Faced with critically low enrollment , Delta Psi Delta finally dissolved in 1991 . The local , coeducational fraternity at Dartmouth was not associated with either the Canadian sorority or the local fraternities at California State University , Chico and Linfield College also named Delta Psi Delta . 
