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Petri Kajonius


Staff member at division of psychology, pedagogy and sociology.

Academic background:

Associate Professor (Docent) (2017)

Doctorate degree, PhD, Psychology (2015)
Licentiate degree in Work- and Personality Psychology (2014)
Advanced level Pedagogy, 90hp (2013)
Master of Science in Social Psychology, 300hp (2007)


Teaching and research interests (key topics):

Personnel Psychology. Social Psychology. Personality and Deviance. Group Psychology. Social Psychiatry. Work- and Organizational Psychology. Intelligence. Subjective Well-being. Personality traits (GFP, Big Five). Intelligence (G-factor). Personality disorders (trait-based, PID5). Happiness (SWB). Groups (Decision-making), Society (SES, Gender). The Big Five, IQ, PID-5 (DSM-5) and more. Dark Triad, Narcissism and Psychopathy. Satisfaction, happiness, and subjective well-being.




  • Kajonius, P.J. (2017). The Short Personality Inventory for DSM-5 and its Conjoined structure with the Common Five-Factor Model. International Journal of Testing, 17(4), 372-384. Taylor & Francis (IF: 1.2, H5: 19).


  • Kajonius, P.J. & MacGiolla, E. (2017). Personality across nations: Support for similarities rather than differences. PLOS One, 12(6): e0179646. (IF: 4.4 , H5: 215). DOI:


  • Persson, B., Kajonius, P., & Garcia, D. (2017). Testing construct independence in the Short Dark Triad using Item Response Theory. Personality and Individual Differences, 117, 74-80. (5-year IF, 2.3, H5: 89)


  • Persson, B., Kajonius, P. & Garcia, D. (2017). Revisiting the Structure of the Short Dark Triad. Assessment. 1-14. Sage. (IF: 2.9, H5: 45). DOI: 10.1177/1073191117701192


  • Kajonius, P. (2017). Cross-cultural personality differences between East Asia and Northern Europe. International Journal of Personality Psychology, 3, 1-10.


  • Kajonius, P.J. & Carlander, A. (2017). Who gets ahead in life? Personality traits and childhood background in economic success. Journal of Economic Psychology, 59, 164-170. Elsevier. (IF: 2.1, H5: 54).    DOI:10.1016/j.joep.2017.03.004


  • Persson, B. & Kajonius, P. (2016). Empathy and Universal Values Explicated by the Empathy-Altruism Hypothesis. The Journal of Social Psychology, 156(6), 610-619. Taylor & Francis, (IF:1.3, H5: 29).


  • Kajonius, P. Persson, B., Rosenberg, P.,& Garcia, D. (2016). The (mis)measurement of the Dark Triad Dirty Dozen: Exploitation at the core of the scale. PeerJ, 4, e1748 (IF: 2.3, H5: 28). Samarbete med Göteborgs universitet och Blekinge Kompetenscenter, Landstinget.


  • Kajonius, P. & Dåderman, A.(2017). Conceptualizations of Personality Disorders with the Five-Factor Model-count and Empathy Traits. International Journal of Testing,17(2), 145-157. Taylor & Francis (IF: 1.2, H5: 19).


  • Kajonius, P.J. (2016). Honesty-Humility Predicting Self-reported Academic Potential. International Journal of Personality Psychology, 2, 1-6.


  • Corlin, T., Kajonius, P., & Kazemi, A. (Online published, September, 2016). Personality in User-Oriented Elderly Care. International Journal of Older People Nursing. (H5: 21). DOI: 10.1111/opn.12132


  • Kajonius, P.J., Persson, B, & Jonasson, P.K. (2015) Achievement, Power, and Hedonism: Universal Values that Characterize the Dark Triad. Personality and Individual Differences, 77, 173-178. Elsevier. Samarbete med University of Western Sydney, Australia. (5-year IF, 2.3, H5: 89)


  • Grankvist, G., Kajonius, P., & Persson, B. (2016). The relationship between mind-body dualism and personal values. International Journal of Psychological Studies, 8(2), 1-15. Canadian Center of Science and Education. (H5: 18).


  • Kajonius, P. & Dåderman, A. (2014). Honesty-Humility, the Big Five, and Liberal Values in Swedish Students. Europe's Journal of Psychology, 10(1), 104-117. (H5: 19)


  • Kajonius, P. (2014). Honesty-Humility in contemporary students: manipulations of self-image by inflated IQ estimations. Psychological Reports, 115(1), 311-325. Ammons Publishing. (H5: 42)


  • Grankvist, G. & Kajonius, P. (2015). Personality traits and personal values: A replication with a Swedish sample. International Journal of Personality Psychology, 1(1), 8-14. World Association of Personality Psychology (WAPP).
  • Kajonius, P. (2013). The Effect of Information Overload on Charity Donations. International Journal of Psychology and Behavioral Sciences, 4(1), 41-50. (H5: 11)



  • Kajonius, P. (2017). Five Factor Model-Based Personality Disorders across Sex and Age-groups (N= 320,128). 107th Annual Meeting of the American Psychopathological Association, March 2-4, 2017. Times Square, Manhattan, New York, US.
  • Roos, M. & Kajonius, P.J. (2017). Expert validity on non-verbal personality characters 14th European Conference of Psychological Assessment, Lisbon, Portugal, 5-8 July
  • Persson, B., Kajonius, P. Rosenberg, P. & Garcia, D. (2016). The Single Item Dirty Dark Triad (SIDDT): Exploitation of Others. American Psychological Science (APS), 28th Annual Convention, Chigago, 2016. Poster-session.


  • Garcia, D., Persson, B, & Kajonius, P. (2016). Item Response Analysis of the Short Dark Triad Questionnaire. International Convention of Psychological Science, Vienna, Austria, 2016, 23-25 March. Poster.



  • Roos, M. & Kajonius, P.J. (2016). Big Five Manga – a non-verbal pathway to personality? 31st International Congress of Psychology, Yokohama, Japan, 24-29 July. Poster.



  • Persson, B. & Kajonius, P. (2016). Dark Values: The Dark Triad in Schwartz’s Value Types: Robert Thornberg, Tomas Jungert (2016). Independent in the heard: Inclusion and exclusion as social processes. Proceedings from the 9th GRASP conference, Linköping University, May 2014 (2/2/2016).



  • Kajonius, P. & Roos, M. (2016). The American Dream in Sweden – a representative sample. World Conference in Personality Psychology II (WCPII), Brazil. Oral presentation.



  • Roos. M. & Kajonius, P. (2016). The Personality Map of Sweden. WCP II, Brazil. Poster.



  • Roos, M. & Kajonius, P. (2016). Non-verbal personality assessment with 10 cartoon-like portrayals. WCP II, Brazil. Oral presentation.



  • Persson, B. & Kajonius, P. (2016). Dark Values and Bright Values: Universal Values Generated by Callousness and Empathy. WCP II, Brazil. Poster.



  • Kajonius, P. & Dåderman, A. (2016). The Five-Factor Model and Structure of Personality Disorders. WCP II, Brazil. Poster.



  • Kajonius, P. (2015). The Impact of Personality Traits, Values, and Abilities on the View of Uniqueness of Consciousness. Abstract presented at Towards a Science of Consciousness, XXII, Helsinki, 2015. Oral presentation. Chair.


  • Grankvist, G. & Kajonius, P. (2015). Beliefs in Dualism and Personal Values. Abstract presented at Towards a Science of Consciousness, XXII, Helsinki, 2015. Oral presentation.
  • Roos, M. & Kajonius, P. (2015). Non-verbal personality assessment with 10 cartoon-like portrayals. European Conference of Psychological Assessment XIII, Zurich, Switzerland, 2015. Oral presentation.
  • Kajonius, P. (2014). The relationship between Honesty-Humility, Socio-economic status and Intelligence. ECP17. European Association of Personality Psychology, XVII. Lausanne, Switzerland, 2014. Oral presentation.
  • Kajonius, P. (2014). Self-estimated IQ Varies with Context: ICAR16 compared with a Swedish Intelligence test. Abstract accepted at International Society for Intelligence Research (ISIR), Graz, Austria, 2014. Poster.
  • Kajonius, P. & Kazemi, A. (2014). Process and Structure in Swedish Elderly Care. 22nd Nordic Congress of Gerontology, Age Well, 2014, Göteborg Scandinavium. Oral presentation. Chair.


  • Kajonius, P. (2014). Leadership Climate in Swedish Elderly Care. Nordic Group and Social Psychological Conference, Linköping, 2014. Oral presentation.



  • Kajonius, P. & Persson, B. (2014). Dark Values of Inclusion and Exclusion. Nordic Group and Social Psychological Conference, Linköping, 2014. Oral presentation.



  • Kajonius, P. (2012). Kritiskt tänkande och högskolans kritiska uppdrag, Nu2012. Chalmers konferenser. 2012, 1-8. Oral presentation