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Comparison of mean objective evaluation score—facial expression between two categories by unpaired t-test
| Categories A vs B | t | df | Sig. (two-tailed) p-value | Mean difference | Confidence interval (CI) | |
|---|---|---|---|---|---|---|
| Lower | Upper | |||||
| 1.30 ± 0.470 | −6.449 | 38 | <0.001* | −0.900 | −1.183 | −0.617 |
| 2.20 ± 0.410 | ||||||
*Statistically significant
