The aim of the present research was (a) to investigate the structure of working alliance assessed by means of the Working Alliance Inventory (WAI, two versions: WAI-PA for patients and WAI-PT for psychotherapists) in adult psychotherapy and (b) to present the Polish version of the 36-item WAI and its psychometric properties. The sample consisted of 428 subjects: 262 patients attending individual psychotherapy and 166 psychotherapists. Data were analyzed using confirmatory factor analysis (CFA) and classical (Cronbach’s α, Jöreskog’s CR) and nonclassical (Aranowska’s γ, ϱ2 intra-class correlation coefficient) reliability coefficients. The adopted validation strategy brought the expected results, revealing the three-factor structure of the Polish versions of the WAI identical to the structure of the original measures. The results of the analyses provided strong evidence pointing to the acceptable goodness of working alliance quality measurement using the Polish versions of the examined instruments. Strong evidence has been found indicating that the theoretical model of alliance defined on three dimensions, Goals–Tasks–Bonds, is empirically supported. The results of analyses also show that the adapted and developed WAI is a psychometrically valuable measure.

本研究的目的是（a）研究在成人心理治疗中通过工作联盟清单（WAI，两种版本：针对患者的WAI-PA和针对心理治疗师的WAI-PT）评估的工作联盟的结构，以及（b）展示波兰版的36个项目的WAI及其心理计量特性。该样本由428位受试者组成：262位接受个体心理治疗的患者和166位心理治疗师。使用验证性因子分析（CFA）和经典（Cronbach'sα，Jöreskog's CR）和非经典（Aranowska'sγ，ϱ2类内相关系数）可靠性系数对数据进行分析。采用的验证策略带来了预期的结果，揭示了WAI波兰语版本的三因素结构，与原始度量的结构相同。分析的结果提供了有力的证据，表明使用被检验工具的波兰语版本的工作联盟质量度量的可接受性。已经发现有力的证据表明，在经验，目标，任务，债券三个维度上定义的联盟理论模型得到了支持。分析结果还表明，适应和发展的WAI是一种在心理上有价值的措施。