Reliability and factorial validity of long and brief versions of the inventory of personality organization in a Latvian sample.

The aim of this study was to examine the construct validity and reliability of long and brief versions (57 and 16 items) of the inventory of personality organization (IPO) in a Latvian nonclinical sample. The actuality of this study is dictated by the number of persons suffering from personality disorders, and the excessive need for reliable constructs for the assessment of personality in the normality-abnormality range. The total number of participants of the study was 1118, recruited in several subsamples, which were employed for the investigation of the factor structure, psychometric properties, test-retest, and convergent validity of the IPO-57 and IPO-16 scales.