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Gepubliceerd in: Mindfulness 4/2017

23-01-2017 | ORIGINAL PAPER

Measuring Mindfulness: Applying Generalizability Theory to Distinguish between State and Trait

Auteurs: Oleg N. Medvedev, Christian U. Krägeloh, Ajit Narayanan, Richard J. Siegert

Gepubliceerd in: Mindfulness | Uitgave 4/2017

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Abstract

Mindfulness can be conceptualized as either a state or a trait, but currently, there is no reliable psychometric method to distinguish clearly between the two in psychological measures. Notwithstanding the clinical effectiveness of mindfulness, any specific element of mindfulness treatment can only be evaluated by comparing state and trait changes using techniques that allow such changes to be measured. Generalizability Theory (GT) is a suitable method to differentiate between state and trait variance components, and its application is illustrated here with an empirical example using the Toronto Mindfulness Scale (TMS). Person × occasion interaction is a marker of individual state changes and should explain the largest amount of variance in a valid state measure. To assess state variability, data were collected on three separate occasions: (i) after a holiday, (ii) immediately after a mindfulness exercise, and (iii) before a stressful event (i.e., exam). Generalizability analysis was applied to examine sources of true and error variances. The TMS captured a larger amount of variance attributed to a state and only a small amount associated with trait mindfulness, which is consistent with the purpose of the measure. This study has demonstrated that Generalizability Theory can be usefully applied to distinguish between state and trait components in a measure, and it is recommended as an appropriate psychometric method to validate state and trait measurement tools. These findings have far-reaching implications to improve the accuracy of the distinction between state and trait in mindfulness measurement and other areas of psychological assessment.
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Metagegevens
Titel
Measuring Mindfulness: Applying Generalizability Theory to Distinguish between State and Trait
Auteurs
Oleg N. Medvedev
Christian U. Krägeloh
Ajit Narayanan
Richard J. Siegert
Publicatiedatum
23-01-2017
Uitgeverij
Springer US
Gepubliceerd in
Mindfulness / Uitgave 4/2017
Print ISSN: 1868-8527
Elektronisch ISSN: 1868-8535
DOI
https://doi.org/10.1007/s12671-017-0679-0