Fig. 1

(A) Changes in positive affect between group singing and yoga groups. As shown, both groups showed a significant increase in positive affect scores following their respective group activity. Positive affect scores obtained before group activity did not differ significantly between groups. Error bars reflect bootstrapped 95% confidence intervals around the mean. *p <0.1 ** p <0.01 *** p < 0.001. (B) Changes in negative affect between group singing and yoga groups. As shown, there were no significant changes in negative affect following group activity in either group singing or yoga nor between groups before group activity (pre). Error bars reflect bootstrapped 95% confidence intervals around the mean. *p < 0.1 **p <0.01 *** p < 0.001.