The phenomenon of over-achievement and under-achievement among school populations and the probable correlates of these two achievement patterns has been the subject of a number of studies reported in the literature (Altus). The study reported here was designed to determine what differences, if any, exist between high school seniors classified as overachievers, normal achievers, and under-achievers on the basis of a relationship between I& scores and grade point average, and measures of their attitudes toward study, certain personality traits, and problems which they manifest.
PROCEDUREA sample of 475 seniors in two urban Indiana high schools were used as subjects. For the total sample of 475 an IQ score was obtained from performance on the Otis Qriick Scoring Mental Abilities Test (Gamma Test, Form C). In addition, a grade point. :wer:tge representing grades earned in three years of high school study in the four course :ire:ts of Eiiglish, Srienre, hfathematirs, and Social Science was computed for each student. After the selection of the three su1)s:tmples (over-achievers, normal achievers, arid under-achievers), these three groups were given the 13rown-Holtzm:in Survey of Study Habits :tiid Attitudes, the C:tlifornia I'sy(:liological Iuventory, sncl the High Scliool Form of the Mooney Problem Check List.The three groups of under-:toliievers, over-:iehievcrs, and normal achievers were selected by first constructing a so:tttergr:im h u e d on the ()tis IQ and the collootive grade point :kver:iges for :dl 475 senior students. Grade point average was c:omprit,cd by :issigning :I weight of 100 to "A," 75 to "B," 50 to "C," 25 to "I)," and 0 to "F." The mc:m IQ for the tot:d s:iml)lc w:ts 99.2 with a standard deviation of 12.1. The mean grade point average for the tiiree year sequciiw of hhglish, Mathematirs, Science, and Socitil Science was 49.8 with a stantlard devi:tt,ioii of 17.4. On t,he h s i s of these means, the scattergram was divided into four sertioiis. Although, on inspection, the sc::it.tergr:tm indicated a positive correlation, patterns of atypical groupings were identified. Oiie group w:m 1:il)eled underachieving on the b:isis of grade point averages I d o w the mean for t,he t,ot:il s:tmplc with IQ scores above the total s:tmple mean for IQ. Another group w:is identified by inspection arid I:il)elcd overachieving on the basis of grade point averages above the mean and IQ below the mcaii. The iiormsl achieving group was made up of students whose I& and grade point aver:ige most nearly conformed to the regression line indicating high positive A ratio of mean grade point average to mean IQ was calciil:tted for each subject in the three groups. The differences betw-een all groups compared on the basis of these ratios were significant at the .01 level of confidence.From the method described :Lbove, 18 over-aohievers, 27 normal achievers, and 25 under-achievers were identified. Responses on the 13rowwHoltzman Survey of Study H:d)it.s, the C:ilifornia Psychological Invent,or,v, arid thc Mooney Problem Check L...