Optimisme en/of pessimisme: factorstructuur van de Nederlandse Life Orientation Test-Revised


Klooster, P.M. ten and Weekers, A.M. and Eggelmeijer, F. and Woerkom, J.M. van and Drossaert, C.H.C. and Taal, E. and Baneke, J.J. and Rasker, J.J. (2010) Optimisme en/of pessimisme: factorstructuur van de Nederlandse Life Orientation Test-Revised. Psychologie & gezondheid, 38 (2). pp. 89-100. ISSN 1873-1791

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Abstract:This study examined the construct validity of the Dutch Life Orientation
Test-Revised (LOT-R) in two samples; one sample of patients with psychiatric
disorders (n=157) and one sample of patients with rheumatoid arthritis
(RA, n=83). Confirmatory factor analyses showed that the LOT-R was not
sufficiently unidimensional and could be better explained by two underlying
factors consisting of positively and negatively worded items, respectively.
This two-factor solution fitted the data significantly better than the onefactor
solution in both groups, but satisfied all criteria for good model fit in
the psychiatric patient sample only. One-factor models allowing correlated
error terms between the positively or negatively worded items performed
equally better than the original one-factor solution in both groups, indicating
that the two factors may be the result of the specific wording of the
items. However, the two factors were differentially associated with other
relevant psychological constructs and correlation patterns differed substantially
between both populations, indicating possible conceptual differences
between optimism and pessimism. Overall, the findings suggest that the
positively and negatively worded items of the Dutch LOT-R do not reflect a
true unidimensional construct, but two underlying factors which may reflect
a complex combination of methodological artefact and substantive differences.
Therefore, researchers using the Dutch LOT-R are encouraged to not
only rely on total scale scores, but to use additional sub-scores for optimism
and pessimism to better examine possible relationships and effects
in optimism research.
Item Type:Article
Faculty of Behavioural, Management and Social sciences (BMS)
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Link to this item:http://purl.utwente.nl/publications/73328
Official URL:http://vb23.bsl.nl/frontend/redir.asp?page=1873-1791/09014f3c802a70e8.html
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