The iSchool movement is a controversial topic within the library and information science (LIS) community. While some argue that the movement isolates small size schools and splits the LIS community others insist it will broaden the field of LIS and form an open and boundaryless iField. This study investigates the evolution of the iSchool movement by analyzing the trends of subject terms in LIS doctoral dissertations since 1970s. The results indicate that the iSchool movement reflects the trend of LIS in terms of the change of the dominant research topics and the degree of interdisciplinarity.