Both Abolition and Correction tried to persuade Americans of the “truth”. The truth here is of course relative, and questionable, because both claimed to be telling the real story. Questions then lie in the persuasiveness of each film in the attitudes of their viewers. Does the order in which you see each film play a factor? What if you see only one film but not the other? A study performed by Bradley S. Greenberg in 1963 set out to answer these questions.
Greenberg’s study consisted of 144 students enrolled in a California college. The students were divided in a way “to equate as closely as possible the initial level of attitude toward HUAC. Suffice to say at this point that no significant differences existed among the subject groups assigned to the film treatments, and no subject who had seen either film within the past six months was included in the final analyses.” (Greenberg, 1963) The groups were split into four viewing groups OA: Abolition only, OC: Correction only, OA-OC: Abolition then Correction, and OC-OA: Correction then Abolition. Two weeks before the first screening students were asked a series of questions and answer according to adjectives used in both films; the same test was administered after the screenings as well, however, on the first test the terms HUAC and ACLU were mixed in among other ideas.
The results were, well, some what expected. Each film--when viewed solo--had the desired effect, in other words it fulfilled its propagandist goal. The interesting find came from the persuasive power of the films. It was discovered that regardless of order, those who had seen Correction had “attitudes that are comparable to those maintained by a group which has seen only Operation Correction. All three treatments that received Operation Correction were more unfavorable to HUAC.” The findings conclude that seeing either film leaves the audience as how the filmmaker intended, but in this study seeing both films sways viewers to the beliefs of Operation Correction.
Greenberg's study can be found at:
Greenberg, B.S. "Operation Abolition" vs. "Operation Correction." Audio Visual Communication Review, Vol. 11, No. 3 (1963), pp. 40-46

