 Several possible reasons are given for this, not the least that PSI represented a too radical deviation from established teaching practices and educational management routines.Other explanations include conflicts within the PSI movement and the challenge that PSI demands more teaching effort.However, it has been speculated that PSI might see a revival with modern educational technology, as information technology could gradually alleviate teacher burdens related to frequent testing and feedback, as well as mitigate the increased administrative complexity that courses with student self-pacing have over those with instructor-set pace.