TABLE IX

Improvement in I.Q., 28 Pairs

N[16] Test Group (A) Control Group (B)
Test 1Test 2GainTest 1Test 2Gain
27110 109 -1 72 96 24 -25
20106 102 -4 118 131 13 -17
891 86 -5 98 104 6 -11
24131 124 -7 89 92 3 -10
2164 67 3 86 97 11 -8
394 91 -3 82 85 3 -6
1298 95 -3 98 101 3 -6
2385 94 9 81 96 15 -6
11103 100 -3 101 102 1 -4
1597 94 -3 78 79 1 -4
1898 98 0 90 94 4 -4
496 96 0 83 85 2 -2
2680 76 -4 90 88 -2 -2
1665 73 8 74 82 8 0
2881 84 3 95 98 3 0
595 99 4 114 117 3 1
2107 114 7 91 96 5 2
10110 109 -1 104 100 -4 3
1771 77 6 96 99 3 3
791 99 8 95 99 4 4
182 83 1 80 76 -4 5
695 101 6 88 89 1 5
1996 101 5 98 98 0 5
983 93 10 87 90 3 7
2577 76 -1 145 137 -8 7
1370 78 8 66 64 -2 10
2291 100 9 63 62 -1 10
1496 107 11 140 137 3 14
Av.91·5393·782·2592·9396·213·285-1·035
M 2 -1 -0·015
75%ile7 +·04 5
25%ile-3 -·16 -6
Q5 2·5 5·5
P. E. (distribution)5·252·5 5
P. E. (average)±·99±·47 ±1·10
Av.= -·94 P. E.
M.= -·99 P. E.

TABLE X

Improvement in Performance of Healy Test, 24 Pairs

N[16] Test Group (A) Control Group (B)
Test 1Test 2GainTest 1Test 2Gain
7- 6 -28 -22 4·5 27·5 23 -45
1343 42 - 1 - 1·5 30·5 -32 -33
1729·5 12 17·5 1·5 15 - 13·5 -31
157 25 18 1 42·5 41·5 23·5
2622·5 7 -15·5 56 61·5 5·5 -21·5
10-12 6·5 18·5 27 65 38 -19·5
1957·5 49 - 8·5 -22 -11 11 -19·5
2454·5 63 8·5 31·5 59·5 28 -19·5
200 -11 -11 30 35 5 -16
93·5 10·5 7 34 55 21 -14
11-8 6 14 -29 -3·5 25·5 -11·5
1649 47·5 - 1·5 30 37 7 - 8·5
1-25 2 27 -50 -16 34 - 7
2248·5 43·5 - 534·5 33·5 - 1 - 4
18-13·5 -12 1·5 -32 -28 4 - 2·5
2349·5 68 18·5 4 25 21 - 2·5
321·5 22·5 1 17 19 2 - 1
1220 21 1 -10 -12 - 2 3
1412·5 48·5 36 - 5 25·5 30·5 6·5
27-25 15 40 2 27·5 25·5 14·5
228·5 30 1·5 3-11 -14 15·5
258 25 17 29·5 29 -·5 17·5
2120 32 12 70·5 58·5 -12 24
2829·5 73·5 44 64·5 51·5 -13 57
Av.17·2924·947·6412·1225·6913·56- 5·85
M 4.25- 7·75-0·015
75%ile18 +·043
25%ile-5 -·16-19·5
Q11·5 13 11·25
P. E. (distribution)10·6 10·5613·65
P. E. (average)±2·16± 2·16± 3·05
Av.= -1·92 P. E.
M.= -2·54 P. E.

Similarly, it might be thought that the children who had suffered from the defects for a comparatively short time, might reveal greater improvement in intelligence after six months than those who had been afflicted for a longer space of time. We had no way of knowing definitely how long the defects had been present in the cases studied. Roughly, though, we may say that in general the older boys have had defective tonsils and adenoids for a longer time than the younger ones, and that the older the boy, the older the defect. On this basis, if correlation of youth with gain in I.Q. should give a larger positive value for r, we might be justified in saying that the younger boys, who have been handicapped for a lesser period, show greater mental recuperation than their older companions. Such a correlation was attempted in the test group, correlating age at the first test with gain in I.Q. The same methods and formulae were used as in the weight and intelligence comparison, the greatest gain in I.Q. being given first position, and the lowest age. The resulting value for r was -·24, with an unreliability of ·186. The relationship would appear to be in the other direction but it is so small, with an unreliability measure so large as to be insignificant. Once more, then, we find in our results no correspondence between recency of defect and quick mental recovery.

TABLE XI

Showing percentile ratings of the members of the two groups at the beginning and end of the six months' interval

Weight Height Grip Tapping
1·29 ·44 ·25 ·40 ·47 ·40 ·51 ·33
1C·43·54 ·27·45 ·33 ·47·17·30
2·04 ·10 ·04 ·11 ·16·16 ·16 ·25
2C·38 ·55 ·20 ·32·25 ·40 ·80 ·28
3·46·59·32·49 ·44 ·56 ·52·58
3C·65 ·69 ·74 ·81 ·54·67·51 ·42
4·33 ·44 ·39 ·52 ·16 ·13
4C·27·32 ·51·78·18 ·19
5·16 ·20·18 ·20 ·33 ·23
5C·50 ·53 ·28 ·47 ·40 ·87
6·12·15 ·06·10 ·10 ·23
6C·31 ·40 ·22 ·38·27 ·41
7·03 ·07·05 ·15 ·07 ·06 ·40 ·27
7C·01·02 ·03·07 ·16 ·24 ·16
8·62 ·71 ·63 ·75 ·24 ·27·23
8C·18 ·37 ·31 ·40·67 ·72 ·43 ·11
9·31·41·47·53 ·26 ·47·71 ·51
9C·60 ·65 ·76 ·89 ·76·89 ·63·78
10·26 ·35 ·26 ·43 ·44 ·33 ·01 ·04
10C·21·22 ·23·37·24 ·67 ·02 ·51
11·24 ·23·25 ·43 ·33·67·40·08
11C·08 ·09 ·09 ·17 ·36 ·36 ·86 ·11
12·25·40 ·15 ·53 ·08
12C·06 ·15 ·02 ·08 ·04 ·01 ·12·03
13·951·00·991·00·991·00 ·90 ·66
13C·87·89·93·96 ·94·96·78 ·36
14·49·66·67·74 ·72·67 1·00 ·57
14C·92 ·93 ·96 ·98 ·93 ·98 ·97·97
15·56 ·68 ·70 ·95 ·94
15C·79·80 ·59 ·66·67 ·70 ·62 ·54
16·49·53 ·74 ·79 ·81 ·77·69
16C·34·28·50·54 ·24·24 ·69 ·51
17·53 ·50 ·53 ·05 ·78
17C·17 ·15 ·24 ·11 ·40·34
18·57 ·38 ·33 ·45 ·51
18C·17·20·30·34 ·10 ·06 ·09 ·03
19·95 ·99 ·94 ·98·94 ·88·93
19·38 ·45 ·30 ·37 ·67·40 ·09 ·31
20·13 ·37 ·33 ·16 ·23
20C·63 ·75 ·56 ·88 ·67 ·44 ·78·86
21·83 ·89·84 ·76 ·76 ·80 ·44
21C·67·77 ·55 ·61 ·81·67·62 ·57
22·85 ·81 ·91·78 ·95 ·92·99
22C·83 ·92 ·93·97 ·82 ·91 ·33 ·89
23·36 ·45 ·36·70 ·78 ·63
23C·73 ·74 ·70 ·82 ·55 ·53·36·62
24·59 ·69·67 ·81 ·85 ·89 ·66
24C·62·63 ·59 ·71 ·67·67 ·86 ·86
25·47 ·60 ·57·63 ·53 ·62·78
25C·73 ·74 ·60·64 ·44 ·91 ·70 ·79
26·74·89·74·85 ·53 ·54 ·57
26C·76 ·81 ·70·79 ·84 ·76·40·40
27·11 ·23 ·16 ·04 ·18 ·06
27C·07 ·12 ·12·23 ·10·16 ·30 ·25
28·86 ·90 ·87·90·97 ·88 ·78·91
28C·87·93·83·86·88 ·98 ·94