Claims

Modified film commentaries were consistently superior to the original commentary although differences were not statistically significant at a high level of confidence

Claim · All claims
Evidence · 1 study · causal r? · q2
Currency · newest study 1955 · 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? All modified commentaries produced slightly higher test scores than the original commentary, but the differences were not statistically significant at a high level of confidence. → Nelson 1955

Evidence

Nelson 1955

Nelson, H. E. and Vandermeer, A. W. (1955). The Relative Effectiveness of Differing Commentaries in an Animated Film on Elementary Meteorology. Technical Report SDC 269-7-43. https://eric.ed.gov/?id=ED016911

q2 · i? · causal · r?

A four-version between-group experiment in which 291 air ROTC students viewed one of four film versions with identical visuals and different commentaries and were tested immediately. The review reports "All of the modified commentaries were consistently superior to the original commentary although these differences were not statistically significant at a high level of confidence."

"All of the modified commentaries were consistently superior to the original commentary although these differences were not statistically significant at a high level of confidence."

Discussion

Learner Variables

Page metadata
Field Value
type claim
id modified-commentaries-consistently-superior-not-significant
title Modified film commentaries were consistently superior to the original commentary although differences were not statistically significant at a high level of confidence
description Modified film commentaries were consistently superior to the original commentary although differences were not statistically significant at a high level of confidence
status review
evidence_strength weak
newest_evidence 1955
generated by process:wiki-ingest on 2026-10-28
trust unverified — no one has confirmed this page's content
sources 1 — nelson-1955

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