TABLE 15
25 lines✦
RETEST=POSTTEST COMPARISON UF R#ASONING,FUNDAMENTALS, AND ATTITUDE MEAN SCORESFOR UPPER ONE-HALF ABILITY LEVEL Measure LCD Group LSGD Group+t #tReasoning 1.453 1.361Fundamentals 1.485 1.387Attitude 637 0592 * degrees of freedom = 9t.99 = 1.383; t.95 * 1-833; t,975 = 2-262 67 [i[ 55 The mean and standard deviation of each pretest and each posttestfor the lower one-half ability levels are given in Table 16. The meanscore increased from pretest to posttest in every case except for theattitude scale in the LSGD group. The mean score for the pre-attitudescale was 61.90 and the post-attitude mean score was 60.60. This de-crease in mean score is due largely to student number 20, whose attitudescore dropped 31 points--from 89 to 58. As in the upper one-half abilitygroups, computation of the ratio s/X indicates that the relative disper-sion about the mean decreased in every case, however, the decrease was very slight in the LCD group on the fundamentals test.
✦
