Objective: Sudden gains during psychotherapy have been found to be predictive of positive treatment outcomes. Previous attempts at predicting occurrence of sudden gains have yielded equivocal findings. Recently, intraindividual variability in symptoms during treatment was suggested as a trans-therapeutic and trans-diagnostic predictor of sudden gains. The goal of the present study was to examine this predictor in Internet-delivered treatment for social anxiety disorder (SAD) and to examine whether this predictor predicts sudden gains when measured before treatment begins. Method: We examined data from a preregistered randomized controlled trial (RCT) of Internet-delivered cognitive-behavioral therapy (CBT) for SAD (n = 101). We measured variability in symptoms both within-treatment and before treatment (i.e. during waitlist). Results: Intraindividual variability in symptoms significantly predicted sudden gains both when measured before treatment or within-treatment and correctly classified 84% and 83% of individuals to sudden gains versus non-sudden gains status, respectively. Conclusions: Intraindividual variability in symptoms can predict sudden gains in Internet-delivered treatment for SAD, thus supporting its trans-diagnostic and trans-therapeutic nature. Predicting sudden gains before treatment begins has implications for treatment planning and clinical decision making as well as for personalized tailoring of interventions. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

中文翻译：

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在治疗开始之前预测突然的收获：检查治疗前个体内症状的变化。

目的：发现在心理治疗中的突然获益可以预示积极的治疗结果。先前对预测突然收获发生的尝试已经产生了模棱两可的发现。最近，有人提出治疗过程中症状的个体差异是突然发作的跨治疗和跨诊断的预测指标。本研究的目的是在互联网提供的社交焦虑症（SAD）治疗中检查该预测因子，并检查在治疗开始之前进行测量时该预测因子是否预测突然的获益。方法：我们检查了预注册的互联网提供的SAD认知行为治疗（CBT）的随机对照试验（RCT）的数据（n = 101）。我们测量了治疗期间和治疗之前（即在等待名单期间）症状的变异性。结果：在治疗前或治疗中进行测量时，症状的个体差异显着预测了突然的收获，并且分别正确地将84％和83％的个体分为突然收获和非突然收获状态。结论：症状的个体差异可以预测互联网提供的SAD治疗的突然获益，从而支持其跨诊断和跨治疗的性质。在治疗开始之前预测突然的收获对治疗计划和临床决策以及个性化的干预措施具有影响。（PsycInfo数据库记录（c）2020 APA，保留所有权利）。