. 189.

All of the different authors who have made these researches
(with Binet's method) are in a general way unanimous in
recognizing that the principle of the scale is extremely
fortunate, and all believe that it offers the basis of a most
useful method for the examination of intelligence.[31]

[31] Dr. Otto Bobertag: "L'echelle metrique de l'intelligence," in
_L'Annee Psychologique_ (1912), p. 272.

It serves as a relatively simple and speedy method of securing,
by means accessible to every one, a true insight into the
average level of ability of a child between 3 and 15 years of
age.[32]

[32] Dr. Ernest Meumann: _Experimentelle Paedagogik_ (1913), vol. II,
p. 277.

That, despite the differences in race and language, despite the
divergences in school organization and in methods of
instruction, there should be so decided agreement in the
reactions of the children--is, in my opinion, the best
vindication of the _principle_ of the tests that one could
imagine, because this agreement demonstrates that _the tests do
actually reach and discover the general developmental conditions
of intelligence_ (so far as these are operative in
public-school children of the present cultural epoch), and not
mere fragments of knowledge and attainments acquired by
chance.[33]

[33] Dr. W. Stern: _The Psychological Methods of Testing Intelligence._
Translated by Whipple (1913), p. 49.

It is without doubt the most satisfactory and accurate method of
determining a child's intelligence that we have, and so far
superior to everything else which has been proposed that as yet
there is nothing else to be considered.[34]

[34] Dr. H. H. Goddard: "The Binet Measuring Scale of
Intelligence; What it is and How it is to be Used," in _The
Training School Bulletin_ (1912).

The value of the method lies both in the swiftness and the accuracy with
which it works. One who knows how to apply the tests correctly and who
is experienced in the psychological interpretation of responses can in
forty minutes arrive at a more accurate judgment as to a subject's
intelligence than would be possible without the tests after months or
even years of close observation. The reasons for this have already been
set forth.[35] The difference is something like that between measuring a
person's height with a yardstick and estimating