Results for overall symptoms are presented in the lower triangle; results for negative symptoms are presented in the upper triangle. Significant results are presented in bold. Relative treatments effects are measured by standardized mean difference (SMD) along with its 95% confidence intervals (95% CIs). SMDs lower than 0 favour the column defining treatment. SMDs of –0.2 can be considered small, −0.5 medium, and –0.8 large. To obtain SMDs for comparisons in the opposite direction, negative values should be converted into positive values, and vice versa. ACT – acceptance and commitment therapy, CBT – cognitive behavioral therapy, EFC – experience focused counselling, FI – family intervention, HFIT – hallucination focused integrative treatment, IC – inactive control, MT – metacognitive training, MF – mindfulness, SST – social skills training, ST – supportive therapy, TAU – treatment as usual, WL – waitlist, NMA – network meta‐analysis, PWA – pairwise meta‐analysis.