Intraindividual Variability in Symptoms Consistently Predicts Sudden Gains: An Examination of Three Independent Datasets

Jonathan G. Shalom, Eva Gilboa-Schechtman, Dana Atzil-Slonim, Eran Bar-Kalifa, Ilanit Hasson-Ohayon, Patricia Van Oppen, Anton J.L.M. Van Balkom, Idan M. Aderka

Research output: Contribution to journalArticlepeer-review


Sudden gains are robust predictors of outcome in psychotherapy. However, previous attempts at predicting sudden gains have yielded inconclusive findings. The aim of the present study was to examine a novel, transdiagnostic, transtherapeutic predictor of sudden gains that would replicate in different settings and populations. Specifically, we examined intraindividual variability in symptoms. Method: We examined data from a randomized controlled trial (RCT) of prolonged exposure therapy for posttraumatic stress disorder (PTSD) in children and adolescents (n 63), an RCT of cognitive and behavioral therapies for obsessive- compulsive disorder (OCD) in adults (n 91), and psychodynamic therapy delivered under routine clinical conditions in a naturalistic setting for diverse disorders (n 106). In all 3 data sets, we examined whether a measure of variability in symptoms occurring during the first sessions could predict sudden gains. Results: Variability in symptoms was found to be independent of total change during treatment. Variability in symptoms significantly predicted sudden gains in all 3 data sets and correctly classified 81.0%, 69.2%, and 76.9% of individuals to sudden gain or nonsudden gain status, respectively. Conclusions: The present study represents the first examination of variability in symptoms as a predictor of sudden gains. Findings indicated that sudden gains are significantly predicted by intraindividual variability in symptoms, in diverse settings, contexts, and populations. Advantages of this predictor, as well as clinical and research implications are discussed.

Original languageAmerican English
Pages (from-to)892-902
Number of pages11
JournalJournal of consulting and clinical psychology
Issue number11
StatePublished - 1 Nov 2018


  • Processes of change
  • Sudden gains
  • Symptom variability
  • Transdiagnostic
  • Transtherapeutic

All Science Journal Classification (ASJC) codes

  • Psychiatry and Mental health
  • Clinical Psychology


Dive into the research topics of 'Intraindividual Variability in Symptoms Consistently Predicts Sudden Gains: An Examination of Three Independent Datasets'. Together they form a unique fingerprint.

Cite this