Abstract

HUYSAMEN, Gert K.. Derivation of individualised item interrelatedness indices of careless responding. SA j. ind. Psychol. [online]. 2023, vol.49, n.1, pp.1-7. ISSN 2071-0763.  http://dx.doi.org/10.4102/sajip.v49i0.2070.

ORIENTATION: Presently, carelessly responding (CR) individuals are omitted in terms of several individual indices, including consistency-type indices (that compare performance on only a limited number of matched item pairs), and subsequently, the effectiveness of such screening is evaluated in terms of, among others, the group mean item interrelatedness (IIR) (based on all J[J - 1] item pairs. RESEARCH PURPOSE: This research aims to develop individualised versions of the group IIR measures to render them applicable during the screening phase as substitutes for the presently used consistency-type indices. MOTIVATION FOR THE STUDY: Such individual consistency indices may be used together with other CR indices to jointly determine the eventual evaluation results. RESEARCH APPROACH/DESIGN AND METHOD: To develop the intended CR indices mathematical-statistical principles were applied on the product moment correlation and coefficient alpha formulae. MAIN FINDINGS: Three individual IIR indices have been developed which show individual respondents' respective contributions to the mean item inter-correlation and to coefficient alpha, as measures of group mean IIR. PRACTICAL/MANAGERIAL IMPLICATIONS: These indices may be used during screening in lieu of the existing restrictive consistency indices. CONTRIBUTION/VALUE-ADD: Carelessly responding respondents who previously may have survived screening because of less-inclusive consistency-type IIR indices and consequently may have negatively affected the eventual evaluation results, are now screened out.

Keywords : self-report inventories; Likert items; survey research; careless responding; coefficient alpha.

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