The MATRIX, a novel tool exploring dynamic psychotherapy: Preliminary psychometric properties.

Area of Science:

• Psychology
• Psychotherapy Research

Background:

• Existing psychodynamic psychotherapy measures are often theory-specific and limited in scope.
• Current tools typically focus on either patient or therapist factors, not the interplay.

Purpose of the Study:

• To introduce and evaluate the reliability and construct validity of the newly developed MATRIX research tool.
• To assess the MATRIX's capability for coding content in psychotherapy session transcripts.

Main Methods:

• Inter-rater reliability was tested on 805 fragments from psychodynamic psychotherapy sessions using three independent experts.
• Construct validity was assessed by applying the MATRIX to 30 session segments with diverse theoretical orientations.
• The MATRIX codes patient, therapist, and dyadic events within sessions.

Main Results:

• The MATRIX demonstrated high inter-rater reliability across all coding dimensions.
• The tool showed a high degree of validity in distinguishing between different theoretical orientations in therapy sessions.
• Findings support the MATRIX's utility for quantitative analysis.

Conclusions:

• The MATRIX is a reliable and valid instrument for the quantitative analysis of psychodynamic psychotherapy.
• This tool facilitates moment-to-moment analysis of therapeutic processes.
• The MATRIX can be applied to therapy session transcripts for detailed content coding.