[Validation of a German version of the self-rating Adult Disorganized Attachment scale (ADA-D)]

Disorganized attachment represents the greatest risk factor for psychopathology compared to the "organized" insecure attachment dimensions in various meta-analyses. Recently, the Adult Disorganized Attachment Scale (ADA) was developed as a self-rating scale for measuring disorganized attachment in romantic partnerships. However, a translation and evaluation in German-speaking samples is not yet available.

A German Translation of the scale (ADA-D) comprising nine items was assessed in a general population sample (N=1101) and in a student sample (N=328). The factor structure, psychometric properties, and validity of the scale with respect to psychopathology and the Experiences in Close Relationships questionnaire (ECR-RD) were examined. The differential associations of ADA-D and ECR-RD with psychopathology were determined using linear regression models.

The unidimensional factor structure of the original version could be confirmed for the ADA-D and the instrument exhibited high internal consistency (McDonalds ω=0.91 / 0.89). Compared to attachment anxiety and avoidance, ADA-D was the strongest predictor of dissociative symptoms (Sample 1: β=0.48; p<0.001; Sample 2: β=0.23; p<0.01) and, in Sample 1, additionally for physical aggression (β=0.37; p<0.001).

The ADA-D exhibits good psychometric properties that are comparable to the original version of the scale. The associations with aggressiveness and dissociation are in line with previous findings regarding the unresolved attachment status in the Adult Attachment Interview.

The ADA-D can be recommended for further use in research as a screening instrument for disorganized attachment in adulthood. An application in psychotherapeutic diagnostics seems promising, however, evaluations in clinical samples are necessary beforehand.