Validation of the Relationships Questionnaire (RQ) against the Experience of Close Relationship-Revised Questionnaire in a Clinical Psychiatric Sample

Background: The Relationship Questionnaire (RQ) is a commonly used self-reporting questionnaire used to measure adult attachment styles. The RQ has two parts. RQ1, a single item where individuals have to indicate their preferred relationship style, and RQ2, where individuals can rate their relationship style in more detail using four different scales. Agreement is expected between the highest levels selected and the style chosen in RQ1. An advantage of the RQ is its brevity, whereas a disadvantage is that it constitutes a single item. A validation of RQ has not been clearly demonstrated, even though it has convergent validity in relation to other measurements in this area. Methods: 168 patients completed the RQ, the short version of the Experience in Close Relationships (Revised) questionnaire (ECR-R), and scales of depression and interpersonal problems. Regression analysis was conducted to examine the congruity in regard to attachment theory. Results: ratings from 15.5% of the patients showed disagreement between RQ1 and RQ2. Each type of attachment measured by the RQ was predicted by the ECR-R scores, as hypothesized. In the predictive analysis of depression and interpersonal problems, both RQ dimensions and ECR-R scores were coherent. Conclusions: RQ is a valid self-reported measurement that can be applied clinically on the condition that the rater identifies an agreement between RQ1 and RQ2.