This article continues the series on research presented at the 1998 American Psychological Association Annual Convention, San Francisco, California. Part I of the article describes two types of obstacles to effective interrogation training. Part II of the article (to be posted in next week's IBPP Issue (September 16th) describes approaches to overcoming the obstacles. The article is very closely based on the research of Meir Gilboa, formerly the Commander, National Unit for Serious Crime Investigation, Israeli National Police, as presented at the symposium "Four National Approaches to Training Interrogators" that was chaired by Dr. Paul Ekman of the University of California-San Francisco. (Meir Gilboa can be reached at mgilboa@netvis ion.net.il.)