Extended validation of the Relational Depth Frequency Scale: Retest reliability, divergent and criterion validity, and measurement invariance in UK- and US-stratified samples.
Gina Di MaltaZhuang SheBrett Raymond-BarkerMick CooperPublished in: Journal of clinical psychology (2023)
This contributes important evidence to the validity of the RDFS. Future research should assess predictive validity against psychotherapy outcomes and replicate these analyses in diverse samples.