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Measuring values and committed action with the Engaged Living Scale (ELS): psychometric evaluation in populations with minor depression and chronic pain.

Knirsch, P. (2015) Measuring values and committed action with the Engaged Living Scale (ELS): psychometric evaluation in populations with minor depression and chronic pain.

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Abstract:Objective. Two studies evaluate the psychometric properties of two Engaged Living Scale (ELS) versions (ELS-trait & ELS-state), which were developed to serve as a process-specific scale for one of the three response styles of the Acceptance and Commitment Therapy (ACT), the engaged response style. The first study evaluates the sensitivity to change of the ELS-trait and the reproducibility of its outcomes. The second study is a pilot study that concerns the factorial structure of the ELS-trait successor, the ELS-state. Method. The first study used data from a randomized controlled trial with a sample of 238 chronic pain patients with mean age 53 years (SD= 12,4). We assessed the test-retest reliability of the ELS-trait scores with intervals of three and six months. Furthermore, the study examined the ELS-traits sensitivity to change by the use of external standards: the MHC-SF subscales psychological and emotional well-being. The second study tested the fit of a correlated two-factor model on the ELS-state and further explored the factor-structure with an exploratory factor analysis. Results. The results yield preliminary evidence for the ELS-trait’s sensitivity to measure change in the engaged response style. The ELS-trait has shown to yield stable, yet modifiable results. Outcomes from the pilot indicate a more sophisticated factor-structure underlying the ELS-state, which is in accordance with the ACT-model. Conclusion. The ELS-trait may be used to study mechanisms of therapeutic change and to validate the ACT-model. The temporal references of the ELS-state could lead to more process-specific and detailed results. Further research is needed to confirm these results.
Item Type:Essay (Master)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology MSc (66604)
Link to this item:http://purl.utwente.nl/essays/68632
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