Validation of the Dutch Version of the Perseverative Thinking Questionnaire (PTQ-NL)
Abstract
Repetitive negative thinking (RNT) has been shown to be involved in the maintenance of a variety of emotional problems. In addition, earlier research found that different forms of RNT such as worry and rumination show very similar characteristics. It was therefore suggested that RNT is best conceptualized as a transdiagnostic process. The Perseverative Thinking Questionnaire (PTQ) was developed as a content-independent measure of RNT to allow research into this process from a transdiagnostic perspective. In a recent study, good psychometric properties were established for the original German and English versions of the measure. The current study describes the crossvalidation of the PTQ in two Dutch-speaking samples, one from the Netherlands and one from Belgium (total N = 1,845). The factor structure of the original PTQ with one higher-order factor and three lower-order factors was replicated for the Dutch-language version of the measure (PTQ-NL) using confirmatory factor analyses. In addition, the PTQ-NL showed good internal consistency and satisfactory stability. The validity of the measure was supported by substantial correlations with existing measures of RNT as well as with symptom levels of depression and anxiety.
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