Claims

In one middle-school quasi-experiment, adding written text to spoken narration makes no significant difference to achievement with either abstract or concrete animation

Claim · All claims
Evidence · 1 study (2 entries) · causal r2 · q2
Currency · newest study 2020 · not yet checked against its sources · not reviewed by a person
Evidence quality · No study behind this claim is a peer-reviewed article with a DOI: it rests on a source with no registered publication record (a web page, book or unpublished report). It is kept because 5 design pages cite it; treat it as a lead to check, not an established finding.

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? Non-redundant Sp-A did not significantly differ from redundant W+Sp-A on achievement. → Kutbay 2020 q2 i? Non-redundant Sp-C did not significantly differ from redundant W+Sp-C on achievement. → Kutbay 2020 (2)

Evidence

Kutbay 2020

Kutbay, E. & Akpınar, Y. (2020). Investigating modality, redundancy and signaling principles with abstract and concrete representation. International Journal of Education in Mathematics, Science and Technology (IJEMST), 8(2), 131-145. https://eric.ed.gov/?id=EJ1255527

q2 · i? · causal · r2

Independent-sample t-test in the quasi-experiment comparing spoken-text-only versus written-plus-spoken text with abstract animation. No significant difference: "t (184) = .35, p = .720"; equivalence was not tested.

"there was not a significant difference between the mean achievement scores for the Sp-A group and of the W+Sp-A group; t (184) = .35, p = .720"

Kutbay 2020 (2)

Kutbay, E. & Akpınar, Y. (2020). Investigating modality, redundancy and signaling principles with abstract and concrete representation. International Journal of Education in Mathematics, Science and Technology (IJEMST), 8(2), 131-145. https://eric.ed.gov/?id=EJ1255527

q2 · i? · causal · r2

Independent-sample t-test comparing spoken-text-only versus written-plus-spoken text with concrete animation. No significant difference was found; equivalence was not tested.

"between the mean achievement scores of the Sp-C group and of the W+Sp-C group; t (168) = .89, p = .372"

Discussion

Page metadata
Field Value
type claim
id redundancy-effect-not-significant-middle-school
title In one middle-school quasi-experiment, adding written text to spoken narration makes no significant difference to achievement with either abstract or concrete animation
description In one middle-school quasi-experiment, adding written text to spoken narration makes no significant difference to achievement with either abstract or concrete animation
status review
evidence_strength moderate
newest_evidence 2020
generated by process:wiki-ingest on 2026-10-02
trust unverified — no one has confirmed this page's content
sources 2 — kutbay-2020, kutbay-2020-2

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