Claims

External incentives improved fifth-graders' rate of improvement on school tasks, with the motivated group standing ten points higher than the unmotivated by the ninth period

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

Subclaims

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q2 i? In a parallel-group study, the motivated group's rate of improvement exceeded the unmotivated group's, standing ten points higher by the ninth period of practice. → Waples 1920

Evidence

Waples 1920

Waples, D. (1920). An Approach to the Synthetic Study of Interest in Education: Part I. The Journal of Educational Psychology, XI(6). https://doi.org/10.1037/h0076045

q2 · i? · review · r2

The review reports Chapman and Feeler's (1917) parallel-group study in which thirty-six fifth grade boys and girls were divided and tested for nine successive days on addition, cancellation, and substitution tasks, with direct and borrowed (external incentive) appeals compared; "the motivated group stood ten points higher than the unmotivated."

"By the ninth period the motivated group stood ten points higher than the unmotivated, the points being awarded for each correct operation and subtracted for those incorrect."

Discussion

Page metadata
Field Value
type claim
id chapman-feeler-external-incentive-improvement
title External incentives improved fifth-graders' rate of improvement on school tasks, with the motivated group standing ten points higher than the unmotivated by the ninth period
description External incentives improved fifth-graders' rate of improvement on school tasks, with the motivated group standing ten points higher than the unmotivated by the ninth period
status review
evidence_strength moderate
newest_evidence 1920
generated by process:wiki-ingest on 2026-10-24
trust unverified — no one has confirmed this page's content
sources 1 — waples-1920

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