Participants rated happy and content instructors higher on positive than negative emotion scales, supporting the positivity hypothesis¶
Claim · All claims
Evidence · 1 study (2 entries) · causalr2·q3·i3large
Currency · newest study 2022 · 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.
q3 i3 The happy instructor was rated significantly higher on positive scales than negative scales (d = 1.35), regardless of agent presence. → Lawson 2022
q3 i3 The content instructor was rated significantly higher on positive scales than negative scales (d = 1.18), regardless of agent presence. → Lawson 2022 (2)
Evidence¶
Lawson 2022¶
Lawson, A. P., & Mayer, R. E. (2022). The Power of Voice to Convey Emotion in Multimedia Instructional Messages. International Journal of Artificial Intelligence in Education. https://doi.org/10.1007/s40593-021-00282-y
q3 · i3 · causal · r2
The 2×2×2 valence-by-activity-by-agent ANOVA on happy-instructor ratings in the Mturk experiment showed a main effect for positive vs. negative emotion, with "no significant interaction with presence of agent".
"participants rated the happy instructor significantly higher on positive scales ( M = 3.75, SD = 0.71) than on negative scales ( M = 1.96, SD = 1.20), F(1, 99) = 182.99, p < 0.001, d = 1.35"
Lawson 2022 (2)¶
Lawson, A. P., & Mayer, R. E. (2022). The Power of Voice to Convey Emotion in Multimedia Instructional Messages. International Journal of Artificial Intelligence in Education. https://doi.org/10.1007/s40593-021-00282-y
q3 · i3 · causal · r2
The 2×2×2 ANOVA on content-instructor ratings in the same experiment showed a main effect for positive vs. negative emotion, with no significant interaction with presence of agent.
"participants rated the content instructor significantly higher on positive scales ( M = 3.42, SD = 0.67) than on negative scales (M = 2.15, SD = 1.14), F(1, 99) = 142.25, p < 0.001, d = 1.18"
Discussion¶
Related Claims¶
- Recognizing a frustrated instructor's emotional tone required the embodied onscreen agent, contradicting the voice hypothesis for that emotion — related
- Participants rated frustrated and bored instructors higher on negative than positive emotion scales, with the frustrated effect stronger when the agent was on screen — related
- Voice alone conveys the emotional tone of happy, content, and bored instructors as accurately as voice plus an embodied onscreen agent — related
- Participants detected emotional valence but did not distinguish between discrete emotions of the same valence — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
positivity-effect-positive-instructors-rated-higher-on-positive-scales |
title |
Participants rated happy and content instructors higher on positive than negative emotion scales, supporting the positivity hypothesis |
description |
Participants rated happy and content instructors higher on positive than negative emotion scales, supporting the positivity hypothesis |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2022 |
generated |
by process:wiki-ingest on 2026-10-27 |
trust |
unverified — no one has confirmed this page's content |
sources |
2 — lawson-2022, lawson-2022-2 |
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