Statistical analysis
’ fits
POSITIVE
The effect of ketamine infusion on the scores of the Positive and Negative Affect Schedule (PANAS) was examined by a linear mixed model analysis using To examine the ketamine effect on SAM ratings and AMSR, the mean valence and arousal ratings, as well as TTo examine the ketamine effect on rsFC between CMA and PnC, a linear mixed model was applied. All statistical analyses were performed, and figures were generated using R (version 3.6.3) and the package ggplot2 (version 3.3.3). Linear mixed models were implemented by using the “nlme” library in R version 3.6.3. For all models, an unstructured variance–covariance matrix was used. Normality and homogeneity of the variance were checked via examination of residual plots. Models’ fits were compared by using the anova function from stats packages