The Therapist Evaluation Inventory: evidence for an unidimensional scale

Area of Science:

• Psychology
• Psychotherapy Research
• Clinical Psychology

Background:

• The Therapist Evaluation Inventory (TEI) is used to assess therapeutic relationships.
• Understanding the TEI's internal structure is crucial for its valid application.
• Previous research has not conclusively established the TEI's factor structure.

Purpose of the Study:

• To investigate the internal structure of the Therapist Evaluation Inventory (TEI).
• To determine if the TEI's factor structure aligns with its a priori scales.
• To provide empirical evidence for the psychometric properties of the TEI.

Main Methods:

• Principal components analysis (PCA) with Varimax rotation was employed.
• Data were collected from 292 psychiatrically disturbed adolescent inpatients.
• Therapy sessions were conducted by 16 individual psychotherapists.

Main Results:

• A single underlying dimension explained 70.39% of the TEI's scale variance.
• The analysis did not support the hypothesized factor structure of the TEI.
• The findings suggest a unidimensional nature of the TEI in this population.

Conclusions:

• The internal structure of the TEI may not align with its intended multidimensional scales.
• Further research is needed to validate or revise the TEI.
• The TEI's utility may be limited if its structure is predominantly unidimensional.