The working alliance may be relevant in unguided smartphone-based interventions, but no validated measure exists. We evaluated the psychometric properties of the six-item Digital Working Alliance Inventory (DWAI) using a cross-sectional survey of meditation app users (n = 290) and the intervention arm of a randomized trial testing a smartphone-based meditation app (n = 314). Exploratory factor analysis suggested a single-factor solution which was replicated using longitudinal confirmatory factor analysis. The DWAI showed adequate internal consistency and test–retest reliability. Discriminant validity was supported by a lack of association with social desirability, psychological distress, and preference for a waitlist condition. Convergent validity was supported by positive associations with perceived app effectiveness and preference for an app condition. Supporting predictive validity, DWAI scores positively predicted self-reported and objective app utilization. When assessed at Weeks 3 or 4 of the intervention, but not earlier, DWAI scores predicted pre–post reductions in psychological distress.

该工作联盟可能与基于智能手机的无指导干预措施相关，但不存在经过验证的措施。我们使用冥想应用程序用户的横断面调查 ( n = 290) 和测试基于智能手机的冥想应用程序的随机试验的干预组 ( n = 314）。探索性因素分析提出了单因素解决方案，并使用纵向验证性因素分析进行​​了复制。DWAI 显示出足够的内部一致性和重测可靠性。与社会期望、心理困扰和对候补条件的偏好缺乏关联支持了区分效度。与感知的应用程序有效性和对应用程序条件的偏好的正相关性支持收敛有效性。DWAI 评分可以积极预测自我报告和客观的应用程序使用情况，从而支持预测有效性。在干预的第 3 周或第 4 周（但不是更早）进行评估时，DWAI 分数预测了前后心理困扰的减少。