افزایش سکولار در ضریب هوشی: در استونی، اثر فلین یک اثر جنسن نیست

This study investigated the secular rise in IQ scores over a 60-year period in 12- to 14-year-old Estonian schoolchildren. In 1934/1936, Juhan Tork adapted the U.S. National Intelligence Test for Estonia and administered it to more than 6000 schoolchildren. We administered the same test to 449 students in 1997/1998 and compared the results of 381 of these with a carefully matched sample of 307 from the testing in the 1930s. We found a rise of nearly 1 S.D. on subtests using basic information-processing algorithms such as Comparison and Symbol–Number, but only 0.50 S.D.s on verbal subtests such as Sentence Completion and Concept Comprehension. The secular gains were most pronounced on the low g-loaded subtests. In two compared age groups of children, the rank order correlations between the secular changes on the various subtests and the rank of those subtests on the g factor are negative and nonsignificant, the mean rs=−.40 (one-tailed P=.13). As such, these results supported Rushton's [Pers. Individ. Differ. 26 (1999) 381] finding that the secular rise over time is not occurring on the g factor. In Estonia, the Flynn effect is not a Jensen effect.