At the post-training assessment , the intervention group had improved significantly on Rosenberg Self-Esteem Scale ( Cohen 's d = 0.54 , P = 0.01 ) , Positive and Negative Symptoms Scale ( PANSS ) , General Psychopathology Scale ( Cohen 's d = 0.51 , P = 0.05 ) and the verbal learning domain ( Cohen 's d = 0.46 , P = 0.02 ) .