THIS EXPERIMENT WAS DESIGNED TO FURTHER EARLIER INVESTIGATIONS OF THE GENERAL "SUBSTRATA-FACTOR THEORY OF READING" AND TO TEST TWO HYPOTHESES AT THE HIGH SCHOOL LEVEL OF SUCH KNOWN-GROUPS AS (1) TOTAL, (2) BOYS VERSUS GIRLS, (3) BRIGHT VERSUS DULL, (4) FAST VERSUS SLOW READERS, AND (5) POWERFUL VERSUS NONPOWERFUL READERS. THE MAJOR…

IN THE LONGITUDINAL BERKELEY GROWTH STUDY, SUBJECTS WERE TESTED AT 16, 18, 21, AND 26 YEARS ON THE WECHSLER-BELLEVUE, AND AT 36 YEARS ON THE WECHSLER ADULT INTELLIGENCE SCALE, WHICH CONTAIN BOTH VERBAL AND NON-VERBAL SUBSCALES. THE MOST CONSISTENT INCREASES IN MEAN SCORES OVER THE PERIOD WERE IN INFORMATION, VOCABULARY, AND COMPREHENSION. DIGIT…