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The Construct Validity and Split-Half Reliability of the Affect Grid in Experience Sampling: Alexithymia and Fluctuations in Core Affect

Tiede, Tim (2019) The Construct Validity and Split-Half Reliability of the Affect Grid in Experience Sampling: Alexithymia and Fluctuations in Core Affect.

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Abstract:The affect grid is a single-item measure of the two dimensions of core affect, valence and arousal. It has been frequently used in experience sampling – repeated, long-term measurement with a single measure in a naturalistic environment. However, no study so far has validated the affect grid in this context. The aim of the current study is to investigate the split-half reliability and construct validity of the affect grid in experience sampling. Split-half reliability was tested for with respect to the within-participant mean scores, standard deviations (SD), and mean squared successive differences (MSSD) of valence and arousal. Construct validity was examined by the participants’ standard deviations and MSSD of valence and arousal, and their relation to alexithymia, measured by two subscales of the TAS-20. The affect grid exhibited adequate split-half reliability in all tested facets. With respect to construct validity, a relation of alexithymia with SD and MSSD was found, however, only in case of arousal. In light of research that provides evidence for a connection of alexithymia to arousal, but not valence, these findings indicate adequate construct validity. Conclusively, this study found the affect grid to exhibit adequate reliability and suggests that it is a valid instrument in experience sampling.
Item Type:Essay (Bachelor)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology BSc (56604)
Link to this item:http://purl.utwente.nl/essays/78383
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