What are the various effects of television news documentaries on the knowledge level of the viewer; his attitudes and attitude dimensions; and his potential for changing certain behaviors? To answer such questions, the changes that occurred following exposure to television documentaries dealing with five separate topics were examined and compared. Particular attention was paid to effects that occurred irrespective of topic; the role of initial position in mediating change; and the interrelationship among changes. The personality variables of “open-mindedness” and “intelligence” were also examined.