TOPIC: Assessing the Structure of the Five Factor Model of Personality (IPIPNEO-120) in the Public Domain
This HPCSA Accredited peer-reviewed article with multiple choice questionnaire is accredited for a total of 3 CEU's:
HPCSA Accreditation number:
PSB002/040/01/2021 (3 general ceu’s Level 1)
Kajonius, PJ, and Johnson, JA (2019). Assessing the Structure of the Five Factor Model of Personality (IPIPNEO-120) in the Public Domain. Europe's Journal of Psychology, 2019, Vol. 15(2), 260–275
Petri J. Kajonius* (abc), John A. Johnson (d)
(a) Department of Psychology, University of Gothenburg, Gothenburg, Sweden.
(b) Department of Psychology, University West, Trollhättan, Sweden.
(c) Department of Cognitive Neuroscience and Philosophy, University of Skövde, Skövde, Sweden. [d] Department of
Psychology, Pennsylvania State University, State College, USA.
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Assessment of individual differences in personality traits is arguably one of the hallmarks of psychological research. Testing the structural validity of trait measurements is paramount in this endeavor. In the current study, we investigated 30 facet traits in one of the accessible and comprehensive public-domain Five Factor Model (FFM) personality inventories, IPIP-NEO-120 (Johnson, 2014), using one of the largest US samples to date (N = 320,128). We present structural loadings for all trait facets organized into respective FFM-trait domain (Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness). Both hierarchical second-order and bi-factor models showed tolerable model fit indices, using confirmatory factor analysis in a structural equation modeling (SEM) framework. Some facet traits were substantially more representative than others for their respective trait domain, which facilitate further discussions on FFM-construct content. We conclude that IPIP-NEO is sufficiently structurally robust for future use, for the benefit of research and practice in personality assessment.
Author: Petri Kajonius
Petri Kajonius is an active researcher within the fields of personality and social psychology, and an associate professor in work psychology at University West, Sweden. He is also an acknowledged speaker and communicator of science to the broad public.
Author John A. Johnson
John A. Johnson is Professor Emeritus of Psychology at the Pennsylvania State University. He has published on personality, moral and educational development, career choice, and work performance. Dr. Johnson is a recognized expert on computerized psychological measurement. Over a million persons have completed his on-line personality test, which was designated a Yahoo! Incredibly Useful Site of the Day. Dr. Johnson co-edited a book published by the American Psychological Association, Advanced Methods for Conducting Online Behavioral Research. He currently helps manage the International Personality Item Pool website. He has taught more than 20 different courses and is the recipient of a number of awards for teaching excellence.
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