Objective: The objective for this study was to evaluate the psychometric properties of Psychodynamic Therapy Scale (PTS), including inter-rater reliability, internal consistency and predictive validity. Method: 20 video-taped sessions from 16 different therapists were evaluated by two independent raters using the PTS. The therapy conducted was Life-Stress Interview which is a single-session treatment that stems from psychodynamic theory. Inter-rater reliability was calculated using Intraclass Correlation Coefficient (ICC). Internal consistency was measured using Cronbach's α. Predictive validity was calculated using a linear regression model on the change between baseline and six week follow-up on two outcome measures (DERS-16 & PHQ-15). Results: The ICC for the complete 12-item scale was .77, suggesting a good inter-rater reliability for the PTS. The internal consistency was α = .82 for the entire scale, indicating a good internal consistency. The regression analysis did not show any significant regression on either outcome measure, despite DERS-16 coming close. Discussion: The results indicate that the PTS has a good overall inter-rater reliability and internal consistency. However, further research is needed to determine if these findings still holds true when evaluating more traditional psychodynamic therapy methods and with a higher degree of independence between the raters. Furthermore, future studies could explore if there are potential alterations that can be made to improve the scale.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:lnu-130202 |
| Date | January 2024 |
| Creators | Gertsson, Erik, Lennartsson, Anton |
| Publisher | Linnéuniversitetet, Institutionen för psykologi (PSY) |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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