Children below average in initial ability improve relatively more with practice than those above average, in both feeble-minded and normal groups¶

Claim · All claims
Evidence · 1 study · causal r1 · q3 · i2 medium
Currency · newest study 1915 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i2 The linear correlation between initial ability and percentage of improvement is negative in both groups: r = -.36 (P.E. .13) for the feeble-minded group and r = -.40 (P.E. .14) for the normal group. → Woodrow 1915

Evidence¶

Woodrow 1915¶

Woodrow, H. (1915). Practice and transference in normal and feeble-minded children. The Journal of Educational Psychology. https://scholar.google.com/scholar?q=%22Practice+and+Transference+in+Normal+and+Feeble-Minded+Children%22

q3 · i2 · causal · r1

Correlational analysis of individual practice data from the four-group experiment; the printed correlations are r = -.36 and r = -.40, the latter a medium effect. "On the average then, there was a tendency in both groups for the children who were below the average in initial ability to improve, relatively, more than" those above average.

"the linear correlation between the initial abilities of the children and the percentages of improvement is negative, the correlation being —.36 (P. E., .13) for the feeble-minded group and —.40 (P. E., .14) for the normal group"

Discussion¶

Related Claims¶

• Feeble-minded children show the same amount of improvement with practice as normal children of the same mental age and initial ability on a form sorting task — related
• Correlation between initial ability and absolute improvement is negative but very small and unreliable in both groups — related