Statistical methods
affirmative head nods
REGRESSION
We first checked that the data were suitable for two-way analysis of variance (ANOVA), using Levene’s test for homogeneity of variance and Shapiro–Wilk test of normality (see Supplementary Table To assess the effects of warm facial expressions and affirmative head nods on the therapeutic alliance, treatment credibility and expectancy and other subjective measures, we used a two-way ANOVA test with interaction. The partial eta-squared (To assess whether mistrust would moderate the effect of warm facial expressions and affirmative head nods on therapeutic alliance, we used a multiple regression model with the interaction Data cleaning and processing was performed using 