Claims

Training in cancellation of 3 and 5 produced neither transfer nor interference on cancellation of groups containing 4 and 7

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 1915 · 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? Average gains of trained (15.0 seconds) and control (15.9 seconds) groups agreed, showing neither facilitation nor interference. → Poffenberger 1915

Evidence

Poffenberger 1915

Poffenberger, A. T., Jr. (1915). The influence of improvement in one simple mental process upon other related processes. The Journal of Educational Psychology, 6(8), 459-474. https://doi.org/10.1037/h0075269

q2 · i? · causal · r1

Controlled training experiment: after 100 trials canceling 3's and 5's separately, groups were tested on canceling groups containing 4 and 7, a task with no identical elements and no need to break trained bonds. Gains agreed at 15.0 versus 15.9 seconds.

"If the average gains in the trained and control group are compared, the two will be found to agree, 15.0 and 15.9 respectively. The probable errors of these averages show that they are fairly reliable."

Discussion

Page metadata
Field Value
type claim
id cancellation-4-7-no-transfer
title Training in cancellation of 3 and 5 produced neither transfer nor interference on cancellation of groups containing 4 and 7
description Training in cancellation of 3 and 5 produced neither transfer nor interference on cancellation of groups containing 4 and 7
status review
evidence_strength weak
newest_evidence 1915
generated by process:wiki-ingest on 2026-10-24
trust unverified — no one has confirmed this page's content
sources 1 — poffenberger-1915

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