high-school students of the same mental level.

Binet located this test in year XII of the 1908 series, but shifted it
to year XV in 1911. The American versions of the Binet scale have
usually retained it in year XII, though Goddard admits that the
sentences are somewhat too difficult for that year. Kuhlmann puts the
test in year XII, but reduces the sentences to twenty-four syllables and
permits one re-reading. We give only two trials and our sentences are
considerably more difficult. With the procedure and scoring we have
used, the test is rather easy for the "average adult" group, but a
little too hard for year XIV.

AVERAGE ADULT, ALTERNATIVE TEST 2: COMPREHENSION OF PHYSICAL RELATIONS

(a) _Problem regarding the path of a cannon ball_

PROCEDURE. Draw on a piece of paper a horizontal line six or eight
inches long. Above it, an inch or two, draw a short horizontal line
about an inch long and parallel to the first. Tell the subject that the
long line represents the perfectly level ground of a field, and that the
short line represents a cannon. Explain that the cannon is "_pointed
horizontally (on a level) and is fired across this perfectly level
field_." After it is clear that these conditions of the problem are
comprehended, we add: "_Now, suppose that this cannon is fired off and
that the ball comes to the ground at this point here_ (pointing to the
farther end of the line which represents the field). _Take this pencil
and draw a line which will show what path the cannon ball will take from
the time it leaves the mouth of the cannon till it strikes the ground._"

SCORING. There are four types of response: (1) A straight diagonal line
is drawn from the cannon's mouth to the point where the ball strikes.
(2) A straight line is drawn from the cannon's mouth running
horizontally until almost directly over the goal, at which point the
line drops almost or quite vertically. (3) The path from the cannon's
mouth first rises considerably from the horizontal, at an angle perhaps
of between ten to forty-five degrees, and finally describes a gradual
curve downward to the goal. (4) The line begins almost on a level and
drops more rapidly toward the end of its course.

Only the last is satisfactory. Of course, nothing like a mathematically
accurate solution of the problem is expected. It is sufficient if the
response belongs to the fourth type above instead of being absurd, as
the other types described are. Any one who