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added ranking

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tom.hempel
2026-02-22 18:24:57 +01:00
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@ -395,6 +395,12 @@ Four-panel dashboard comparing reading and tutoring phases across IMI subscales,
VR-specific panel comparing social presence, cybersickness, and Godspeed across mediums. VR achieves the highest social presence (M=3.01 vs Chat M=2.10), moderate cybersickness symptoms, and Godspeed impressions comparable to the other mediums. The elevated social presence in VR without a corresponding increase in Godspeed tutor impression suggests that VR enhances the sense of "being there" without necessarily changing how the tutor is perceived.
### F14 – Medium Preference Rankings (Friedman Test)
![Medium Preference Rankings](Data/plots_questionnaires/Q14_medium_ranking.png)
Within-subject ranking analysis: each of the 18 participants ranked the three tutoring mediums from 1 (most preferred) to 3 (least preferred). **Left panel** shows mean rank per condition with individual data points (jitter) and SEM error bars. **Right panel** shows the percentage of participants assigning each rank position to each condition. Chat received the lowest mean rank (M=1.61), indicating it was most often preferred first (50% of participants ranked it 1st). Video received the highest mean rank (M=2.33), most often placed last. A Friedman test showed no statistically significant difference across mediums (χ²(2) = 4.78, p = .092, Kendall's W = 0.13), likely due to limited power with N=18. Post-hoc Wilcoxon tests (Bonferroni-corrected α = .017) revealed a trend for Chat > Video (p = .027 raw, p = .080 adjusted) that did not survive correction.
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## Summary