A study was conducted to determine the relative effectiveness of several different visual, visual-verbal, and verbal treatments on the recall of factual information. The primary measure of individual differences of subjects involved in the study was that of intelligence quotient (I.Q.). The study attempted to determine whether or not treatments might be differentially designed in order that individual differences of this nature might be adequately accommodated. The subjects, 319 senior high school students, were divided into six treatment groups which were matched as nearly as possible on the variables of sex and age; each of these three groups was further subdivided into three I.Q. groups in order to analyze performance relative to intelligence. Information was presented in formats ranging from visual only through various visual-verbal treatments to one that was verbal only. Subjects were then tested for recall. Analysis of test results suggests that no single treatment was more effective for a given I.Q. group than was any other treatment and that high fidelity, full color visual-verbal presentation of information is the most effective of all the methods of presentation tested. A short list of references is appended. (JY)