Groups one year ahead of normal grade increase more rapidly in both weight and height than normal groups of the same age, with one exception¶

Claim · All claims
Evidence · 1 study · associational r1 · q2
Currency · newest study 1917 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? With one exception, groups one year ahead of normal grade show larger average increments of both weight and height than normal groups of the same age; for some ages groups below normal also grow faster. → Stewart 1917

Evidence¶

Stewart 1917¶

Stewart, S. F. (1917). A study of physical growth and school standing of boys. The Journal of Educational Psychology. https://doi.org/10.1037/h0070804

q2 · i? · associational · r1

Observational analysis of 266 weight increments and 264 height increments distributed by ages and grades (Charts III and IV). Above-normal-grade groups show faster average growth in both measures, and below-normal groups grow faster at some ages.

"With one ex- ception, groups one year ahead of the normal grade are increasing more rapidly both in weight and in height than are normal groups of the same age. For some ages, the groups one year below nor- mal are increasing more rapidly than are the groups of normal grade."

Discussion¶

Related Claims¶

• Among boys of the same age, those one year above normal grade average both heavier and taller than boys of normal grade, and in some cases boys one year below normal also average heavier and taller — a narrower finding that bears on this claim
• Group averages are misleading when applied to individual pupils because of extensive overlapping in weight and height across grades — related
• Physiologically accelerated children are mentally accelerated: height correlates with mental age +0.53 for 49 girls with age held constant — related
• When individual growth-increment curves are correlated with scholarship without reference to body size or stage of development, no decided relation between scholarship and physical growth appears — related
• In a same-age, same-class group of eight boys followed through high school, the higher-scholarship half averaged taller in all four years and heavier in all years except the junior year — related