In a within-subject user study, participants showed longer positive facial expressions under the emotion-aware (Emotion ON) tutoring condition¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Mean duration of positive facial expressions was significantly longer in the Emotion ON condition (1.14s vs. 0.93s, Wilcoxon paired test p=.046); negative and neutral durations showed no significant differences. → Debanjana Kar 2025

Evidence¶

Debanjana Kar 2025¶

Debanjana Kar, Leopold Böss, Dacia Braca, Sebastian Dennerlein, Nina Hubig, Philipp Wintersberger, and Yufang Hou. (2025). MathBuddy: A Multimodal System for Affective Math Tutoring. https://arxiv.org/abs/2508.19993 doi:10.48550/arxiv.2508.19993

q2 · i? · causal · r1

Within-subject user study with 30 participants (aged 15-55) using MathBuddy in Emotion ON and OFF conditions; Wilcoxon paired t-tests on mean per-participant facial emotion durations (Table 4). Negative: p=.537; Neutral: p=.248.

"positive expressions showed a statistically significant difference (p=.046 ), with longer average durations under the Emotion ON condition (1.14s vs. 0.93s)"

Discussion¶

Related Claims¶

• Text-based emotional expression in student responses showed no statistically significant differences between Emotion ON and OFF conditions — related
• MathBuddy's multimodal emotion aggregation matched participant-reviewed emotions at 60% overall accuracy, with sharply reduced recall for the Neutral class — related
• Learners showed reliable pre–post changes in facial, vocal, and lexical expressive signals after sustained system use — related
• Simulation feedback predicts sadness and neutral facial expressions and metacognitive judgement, but not perceived task difficulty — related