The Relation Of The I Q To The Quality Of The Child's School Work

The school work of 504 children was graded by the teachers on a scale of

five grades: _very inferior_, _inferior_, _average_, _superior_, and

_very superior_. When this grouping was compared with that made on the

basis of I Q, fairly close agreement was found. However, in about one

case out of ten there was rather serious disagreement; a child, for

example, would be rated as doing _average_ school work when his I Q

d place him in the _very inferior_ intelligence group.

When the data were searched for explanations of such disagreements it

was found that most of them were plainly due to the failure of teachers

to take into account the age of the child when grading the quality of

his school work. When allowance was made for this tendency there

were no disagreements which justified any serious suspicion as to the

accuracy of the intelligence scale. Minor disagreements may, of course,

be disregarded, since the quality of school work depends in part on

other factors than intelligence, such as industry, health, regularity of

attendance, quality of instruction, etc.