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 · causalr?·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¶
- Creativity — outcome: instruction changes it
Related Claims¶
- The profile-shortened version of a film commentary produced learning equal to the longer script writers' and full versions — related
- Test items based on diagrams did not produce significantly higher scores than purely verbal items — related
- Profile-based shortening removed more sentences and more presentation time than script writers' cuts — related
- About 80 percent of verbal test items were answered correctly by trainees who heard the best commentary without seeing the pictures — related
- The report projects that pre-production profile analysis could have increased Human Reproduction learning by 31 percent — related
- Supplementary examples in an instructional film significantly improve learning, with diminishing returns as example number increases — related
- Announcing an upcoming test did not significantly change learning from the participation film — related
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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