Narcissism inventory-90 (NI-90). Empirically-based reduction and identification of items sensitive for change - A questionnaire particularly suited for measuring self-regulatory parameters
F. Schoeneich et al., Narcissism inventory-90 (NI-90). Empirically-based reduction and identification of items sensitive for change - A questionnaire particularly suited for measuring self-regulatory parameters, PSY PSY MED, 50(9-10), 2000, pp. 396-405
By analysing Narcissism Inventories [1] gathered by the admission from 639
consecutive in-patients, as well as a related sample of inventories gathere
d from 397 consecutive patients (7/93 - 7/96) by admission and discharge, w
e examined the possibility of reducing the number of items of the Narcissis
m Inventory without losing significant information. This examination shows
that reducing the inventory to a total of 5 items per scale is reasonable,
without a relevant loss of metric quality in the item-reduced scares. in ad
dition, items particularly sensitive to change could be identified and poin
tedly kept in the new, reduced scales. Through the deliberate selection of
these items, it was possible to produce an empirically-guided short-version
of the Narcissism Inventory, suited particularly for the examination of cl
inical process and regulatory parameters, With persistence of the original
18 scales proposed by the authors of the original test, a reduction to a to
tal of 90 items results. The name "Narcissism Inventory-90 (NI-90)" is, the
refore, suggested for this new version.