A REACTION TO THE CRITIQUE CONCERNING I/T/A PREPARED BY MARSH AND PUBLISHED IN THE "READING RESEARCH QUARTERLY," FALL 1966, IS PRESENTED. IN THE AUTHORS' OPINIONS, MANY OF MARSH'S ASSUMPTIONS WERE FAULTY BECAUSE OF INADEQUATE INFORMATION, AND THE ASSUMPTION THAT THE I/T/A STUDENTS RECEIVED MORE AND BETTER MATERIALS AND INSTRUCTION IS UNFOUNDED BECAUSE OF THE LACK OF I/T/A MATERIAL DURING THE INITIAL PHASE OF THE EXPERIMENT. THE EFFECTS OF THE BRITISH EXPERIMENT SHOULD BE HELD IN ABEYANCE UNTIL THE FINAL REPORT IS COMPLETED. VARIABLES WHICH HAVE BEEN UNCONTROLLED IN EDUCATIONAL RESEARCH IN GENERAL WERE UNCONTROLLED IN THE I/T/A EXPERIMENT. REFERENCES ARE INCLUDED. THIS ARTICLE APPEARED IN "READING RESEARCH QUARTERLY," VOLUME 3, NUMBER 1, FALL 1967. (BK)