TY - JOUR
T1 - ‘Jumping to conclusions’ data-gathering bias in psychosis and other psychiatric disorders — Two meta-analyses of comparisons between patients and healthy individuals
AU - So, Suzanne Ho-wai
AU - Siu, Nicolson Yat-fan
AU - Wong, Hau-lam
AU - Chan, Wai
AU - Garety, Philippa Anne
PY - 2016/5/13
Y1 - 2016/5/13
N2 - There has been an increase in attention to studying shared mechanisms underlying psychiatric disorders. The ‘Jumping to conclusions’ (JTC11 JTC = Jumping to conclusions. ) bias, a tendency to make decisions with certainty based on insufficient information, has been reported in patients with psychosis, and process-based treatment protocols targeting this bias have recently been developed. This review aimed to investigate to what extent the JTC bias, measured by various tasks, is associated with psychotic disorders and other psychiatric disorders using a meta-analytic approach. We examined 6864 articles published between 1990 and 2015, and meta-analysed 46 studies. The first meta-analysis included 40 effect sizes comparing patients with schizophrenia spectrum or other psychotic disorders and healthy controls. There was a hastier data-gathering style in patients with psychosis than healthy individuals, with a moderate aggregated effect size. The second meta-analysis included 18 effect sizes comparing patients with non-psychotic disorders and healthy controls. There was marked heterogeneity in effect sizes and evidence for publication bias. After removal of outliers, the aggregated effect size for JTC was not statistically significant. A planned subgroup analysis showed no significant effect of JTC in depression. Other diagnostic subgroups yielded small non-significant results. Therefore, our findings do not support the suggestion that JTC is a transdiagnostic phenomenon beyond psychosis.
AB - There has been an increase in attention to studying shared mechanisms underlying psychiatric disorders. The ‘Jumping to conclusions’ (JTC11 JTC = Jumping to conclusions. ) bias, a tendency to make decisions with certainty based on insufficient information, has been reported in patients with psychosis, and process-based treatment protocols targeting this bias have recently been developed. This review aimed to investigate to what extent the JTC bias, measured by various tasks, is associated with psychotic disorders and other psychiatric disorders using a meta-analytic approach. We examined 6864 articles published between 1990 and 2015, and meta-analysed 46 studies. The first meta-analysis included 40 effect sizes comparing patients with schizophrenia spectrum or other psychotic disorders and healthy controls. There was a hastier data-gathering style in patients with psychosis than healthy individuals, with a moderate aggregated effect size. The second meta-analysis included 18 effect sizes comparing patients with non-psychotic disorders and healthy controls. There was marked heterogeneity in effect sizes and evidence for publication bias. After removal of outliers, the aggregated effect size for JTC was not statistically significant. A planned subgroup analysis showed no significant effect of JTC in depression. Other diagnostic subgroups yielded small non-significant results. Therefore, our findings do not support the suggestion that JTC is a transdiagnostic phenomenon beyond psychosis.
KW - Reasoning
KW - Jumping to conclusions
KW - Transdiagnostic
KW - Cognitive bias
KW - Psychosis
KW - Delusions
U2 - 10.1016/j.cpr.2016.05.001
DO - 10.1016/j.cpr.2016.05.001
M3 - Article
SN - 0272-7358
JO - Clinical Psychology Review
JF - Clinical Psychology Review
ER -