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Using the EZ-Diffusion Model to Score a Single-Category Implicit Association Test of Physical Activity.
MedLine Citation:
PMID:  25484621     Owner:  NLM     Status:  Publisher    
OBJECTIVE: The Single-Category Implicit Association Test (SC-IAT) has been used as a method for assessing automatic evaluations of physical activity, but measurement artifact or consciously-held attitudes could be confounding the outcome scores of these measures. The objective of these two studies was to address these measurement concerns by testing the validity of a novel SC-IAT scoring technique.
DESIGN: Study 1 was a cross-sectional study, and study 2 was a prospective study.
METHOD: In study 1, undergraduate students (N = 104) completed SC-IATs for physical activity, flowers, and sedentary behavior. In study 2, undergraduate students (N = 91) completed a SC-IAT for physical activity, self-reported affective and instrumental attitudes toward physical activity, physical activity intentions, and wore an accelerometer for two weeks. The EZ-diffusion model was used to decompose the SC-IAT into three process component scores including the information processing efficiency score.
RESULTS: In study 1, a series of structural equation model comparisons revealed that the information processing score did not share variability across distinct SC-IATs, suggesting it does not represent systematic measurement artifact. In study 2, the information processing efficiency score was shown to be unrelated to self-reported affective and instrumental attitudes toward physical activity, and positively related to physical activity behavior, above and beyond the traditional D-score of the SC-IAT.
CONCLUSIONS: The information processing efficiency score is a valid measure of automatic evaluations of physical activity.
Amanda L Rebar; Nilam Ram; David E Conroy
Publication Detail:
Journal Detail:
Title:  Psychology of sport and exercise     Volume:  16     ISSN:  1469-0292     ISO Abbreviation:  Psychol Sport Exerc     Publication Date:  2015 Mar 
Date Detail:
Created Date:  2014-12-8     Completed Date:  -     Revised Date:  2014-12-10    
Medline Journal Info:
Nlm Unique ID:  101088724     Medline TA:  Psychol Sport Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  96-105     Citation Subset:  -    
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