Inventory of adjectives for assessment of five general personality dimensions

The goal of the study is to document assembling of the Inventory of adjectives (IPJ), which is designated for screening of the five personality dimensions in Czech language, and to introduce its psychometric properties. The basis for the selection of the Big Five markers was formed by the results of a representative taxonomy of Czech personality-relevant adjectives and by results of analysis of inventories containing Big Five markers which were translated to Czech language from American English. On the basis of results of these two studies, 60 pairs of contradictory adjectives were chosen (12 for each dimension) which represent the five-factor personality structure in Czech language. Having determined the factor structure of self-ratings on scales composed from these adjectives, revision of some items of IPJ was carried out and a revised form IPJ-R was compiled. The reliability of IPJ scales ranges between .81 (Intellect/Openness) and .92 (Conscientiousness), and between .76 (Intellect/Openness) and .90 (Extraversion) in the revised version. The reliability of IPJ-R was lower in comparison with the original inventory IPJ and the amount of items with relevant factor load being lower than .30 increased from one to four. In IPJ-R, however, the number of items decreased which attained required load on relevant factor but at the same time attained factor load .30 or higher on other factors as well. Correlation between factor scores of IPJ and NEO-FFI was calculated, the values of convergent validity ranging between .71 (Conscientiousness) and .44 (Intellect/Openness). Psychometric properties of the revised version did not improve that can probably be explained by the low age of respondents who rated themselves on the scales of IPJ-R (M = 17 years). It will therefore be necessary to further verify whether the inventory constitutes a suitable instrument also for assessment of personality structure of adolescents.