Percentile analysis shows the range of ages within a grade is much greater in City C, nearly twice as great as City F for grades two and three¶

Claim · All claims
Evidence · 1 study · associational r2 · q2
Currency · newest study 1920 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? The distance between the 10 and 90 percentiles of age is almost twice as great in City C as in City F in the second and third grades, indicating the higher average ages in City C come mainly from children who have fallen behind. → Pressey 1920

Evidence¶

Pressey 1920¶

Pressey, S. L. (1920). Two Important Points with Regard to Age-Grade Tables. The Journal of Educational Psychology. https://eric.ed.gov/?q=Two+Important+Points+with+Regard+to+Age-Grade+Tables

q2 · i? · associational · r2

Descriptive percentile analysis of the same two-city age-grade tables, comparing 10th and 90th percentile ages per grade. The author interprets this as City C dealing severely with children who have once dropped behind, with about the same acceleration as City F.

"the range of ages in a given grade in City C is much greater, particularly for the second and third grades, where the distance between the 10 and 90 percentiles is almost twice as great in City C as in City F."

Discussion¶

Related Claims¶

• Median-age comparison of two cities shows children in City C substantially older per grade than in City F (first grade nearly six months, fourth grade over eight months) — related