Individuals' composite scale ranks are fairly constant from age fourteen to fifteen¶

Claim · All claims
Evidence · 1 study · associational r2 · q2
Currency · newest study 1915 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Correlation between fourteen- and fifteen-year composite scores is .66 (P.E. .038) for physical tests and .71 (P.E. .034) for mental tests, and shifts of more than 15 points on a 100-point scale are rare. → Woolley 1915

Evidence¶

Woolley 1915¶

Woolley, Helen Thompson. (1915). A new scale of mental and physical measurements for adolescents, and some of its uses. The Journal of Educational Psychology, 6(9), 521-550. https://doi.org/10.1037/h0075644

q2 · i? · associational · r2

Longitudinal analysis of the same children tested at fourteen and fifteen, with tests differing slightly between years and groups not exactly identical. The correlation coefficients were estimated by Edward S. Jones, Assistant Director; large shifts could often be explained by circumstances such as additional schooling or ill health.

"the Pearson co-efficient for the correlation between the fourteen and fifteen year tests of each individual is .66 P. E. .038 for the physical tests, and .71 P. E. .034 for the mental tests. Shifts of more than 15 points on a scale of 100 are rare."

Discussion¶

Related Claims¶

• Mental and physical test ranks correlate positively but weakly, allowing rough sorting into five ability groups — 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