Validity of the Working Alliance Inventory (patient version) in adult systemic psychotherapy

Evidence from an experiment using the non-random change method

Tomasz Prusiński

The Maria Grzegorzewska University


The aim of this study was to verify the validity of the patient version of the Working Alliance Inventory (WAI-PC).

The theoretical validity of the WAI-PC was experimentally estimated using the non-random change method proposed by Cronbach and Meehl.

The results of the t-test showed significant differences between the experimental and control groups.

The study confirmed the validity of the WAI-PC as a tool for measuring alliance in adult psychotherapy.

Słowa kluczowe:

working alliance, Working Alliance Inventory, validity, on-random change method

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Cited By /

Prusiński, T. (2021). Validity of the Working Alliance Inventory (patient version) in adult systemic psychotherapy: Evidence from an experiment using the non-random change method. Przegląd Psychologiczny, 64(3), 209–217.

Tomasz Prusiński 
The Maria Grzegorzewska University


Prawa autorskie (c) 2022 Przegląd Psychologiczny

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