Page:Proceedings of the Royal Society of London Vol 69.djvu/354

338 The following tables resulted from this classification : (a.) Cephalic Index.

Under 78 '5.

Over 78 -5.

Totals.

426 75

475 -75

902-5

_J

^2

-<1

Slow

519-25

571 -25

1090 -5

Totals

946

1047

1993

The correlation deduced from this table between ability as measured by the teacher and dolichocephaly is r = 0'0052 0-0240.

(b.) Length of Head. (Reduced to 12th year.)

Below 184'5 mm.

Above 184'5 mm.

Totals.

Intelligent

404-5

473

877-5

>,

IS <j

536

560 -5

1096 -5

Totals

940-5

1033-5

1974

The correlation, therefore, between short heads and ability is r = -0-0437 0-0242.

((.} Breadth of Head. (Reduced to 12th year.)

Below 145 mm.

Above 145 mm.

Totals.

k,

43

Intelligent

399-5

499

898-5

^

Slow

542

545-5

1087 -5

Totals

941-5

1044-5

1986

The correlation, therefore, between ability and broad heads is r = 0-0843 0-0240.