Children with the same chronological age and mental age pass more group tests in higher grades, an increase the author attributes to additional school experience¶

Claim · All claims
Evidence · 1 study · design r2 · q2
Currency · newest study 1917 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Grade I children chronologically 7 years old with average mental age 7.1-7.5 pass 9.8 tests out of Groups V, VI and VII, while Grade II children of the same chronological age and average mental age, in school two years, pass 10 tests out of Groups VI, VII and VIII. → Lowell 1917

Evidence¶

Lowell 1917¶

Lowell, Frances. (1917). A Preliminary Report of Some Group Tests of General Intelligence. The Journal of Educational Psychology. https://psycnet.apa.org/journals/edu

q2 · i? · design · r2

Observational analysis of Table IV data from the survey's grades one to three children (I.Q.s ranging .40-1.30). The author reports the Grade I figure and parallel Grade II (10 tests) and Grade III (12 tests) figures, attributing the increase to added school experience.

"For example, Table IV shows that in Grade I children who are chronologically 7 years and whose average mental age is 7.1 — 7.5 pass 9.8 tests out of Groups V, VI, and VII"

Discussion¶

Related Claims¶

• Several of the group tests (Discriminating Colors, Mutilated Pictures, Tying Bowknot) showed little discriminative capacity as group tests and are slated for substitution — related
• A smaller percentage of young children pass at age on the group tests than on Kuhlmann's individual tests, with 60 percent versus 78 percent passing at age six — related
• IQs obtained by dividing mental by chronological age remain fairly constant up to the age of 14, which supports treating yearly increments of intelligence as equal absolute units up to about age 14. — related
• The test battery showed striking parallelism between growth of intelligence and age in unretarded children, with leaps at grade transitions — related