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Testing the Assumption of Population Homogeneity in the Measurement of Dispositional Optimism: Factor Mixture Modeling Analysis
Chester Chun Seng Kam
2020-03-03
Source PublicationJournal of Personality Assessment
ISSN0022-3891
Volume102Issue:2Pages:238-249
Abstract

The assumption of population homogeneity in the measurement of dispositional optimism was examined. U.S. and Canadian respondents (N = 591) completed an optimism scale. Possible population heterogeneity was analyzed using factor mixture modeling. Two major results emerged. First, population homogeneity was not supported: A large class of participants had trouble giving consistent answers to optimism items, optimism and pessimism items, or, especially, pessimism items. Second, after the removal of this problematic class, the correlation between optimism and pessimism was found to be.94, a magnitude large enough to support the assumption of unidimensionality. Although psychometric problems with the measurement of optimism have not been identified previously, this study suggests that the typical measurement of dispositional optimism requires substantial revision. The findings showcase the importance of factor mixture modeling in evaluating the psychometric properties of a measurement scale.

DOI10.1080/00223891.2018.1502194
URLView the original
Indexed BySSCI ; SSCI
Language英語English
WOS Research AreaPsychology
WOS SubjectPsychology, Clinical ; Psychology, Social
WOS IDWOS:000510812000011
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Education
Corresponding AuthorChester Chun Seng Kam
AffiliationFaculty of Education,University of Macau,Macao
First Author AffilicationFaculty of Education
Corresponding Author AffilicationFaculty of Education
Recommended Citation
GB/T 7714
Chester Chun Seng Kam. Testing the Assumption of Population Homogeneity in the Measurement of Dispositional Optimism: Factor Mixture Modeling Analysis[J]. Journal of Personality Assessment,2020,102(2):238-249.
APA Chester Chun Seng Kam.(2020).Testing the Assumption of Population Homogeneity in the Measurement of Dispositional Optimism: Factor Mixture Modeling Analysis.Journal of Personality Assessment,102(2),238-249.
MLA Chester Chun Seng Kam."Testing the Assumption of Population Homogeneity in the Measurement of Dispositional Optimism: Factor Mixture Modeling Analysis".Journal of Personality Assessment 102.2(2020):238-249.
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