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Disentangling deceptive communication : situation and person characteristics as
determinants of lying in everyday life
Backbier, E.H.F.
Publication date
2001
Link to publication
Citation for published version (APA):
Backbier, E. H. F. (2001). Disentangling deceptive communication : situation and person
characteristics as determinants of lying in everyday life. Thela Thesis.
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Appendices Appendices
Appendixx C
Ass one of our aims was to construct one or more scales from each of the three pools of itemss whose scalability has not yet been investigated, exploratory scale analyses were conductedd for each item pool separately by means of the Mokken/Molenaar model. Mokkenn (1971), presented a theory and procedure of scale analysis for dichotomous items thatt has become known as Mokken scale analysis. Molenaar (1982, 1986), proposed an extensionn of Mokken's model from the dichotomous to the polytomous case. The program MSPP (Mokken Scale analysis for Polytomous items) is an implementation of this generalisedd model (Molenaar, Debets, Sijtsma, Hemker, 1994). Molenaar and colleagues havee proven that Loevinger's H-coefficient per item pair, per item, and for the scale can be usedd to express the extent to which the Mokken model holds true, and to search for homogeneouss scales from a larger pool of items. According to Mokken scaling, a set of itemss forms a satisfactory scale if all Hy coefficients between item i and j are positive and alll Hj coefficients of item i do not fall below a positive constant. The Hj coefficients show thee extent to which separate items fit into the scale as a whole. A minimum of c= .30 is recommended,, but higher values for Hi and c imply fewer violations and thus a better hierarchy.. One can speak of a "strong" scale for values > .50, of an "average" scale for valuess .40 > Hj < .50, and of a "weak" scale for values .30 > Hj < .40 (Molenaar et al.,
1994;; Molenaar, 1982).
