Medical Radiology and Radiation Safety. 2021. Vol. 66. № 5. P. 18–22

The Ratio of the Extraversion and Fluid Intelligence Levels as a Predictor of the Operators’ Successful Professional Activity 

A.A. Kosenkov

A.I. Burnasyan Federal Medical Biophysical Center, Moscow, Russia

Contact person: Aleksandr Kosenkov: This email address is being protected from spambots. You need JavaScript enabled to view it.


Results: To study the relationship between the ratio of the extraversion and fluid intelligence levels with the success of the professional activity of the nuclear power plants (NPP) operators.

Material and methods: This paper analyzes the results of psychodiagnostic examinations of operators of main control rooms of NPPs that functioned under normal conditions. All individuals were administered the J. Raven's “Progressive matrices”, the Russian language adaptation of the Minnesota Multiphasic Personality Inventory (MMPI) and the Sixteen Personality Factor Questionnaire (16PF, form A). Cross-peer review using the ranking method identified 5 groups of operators with different levels of professional success (from markedly reduced to high).

Results: Using factor analysis, the dimension of the data matrix obtained during the surveys was reduced. Correlation analysis showed that out of 9 identified factors, only 2 had a statistically significant correlation with the success of professional activity, namely, the factors of extraversion (negative relationship) and intelligence (positive relationship). Based on these two factors, an automatic classification of operators was carried out using cluster analysis, as a result of which 5 classes of operators were identified. It was shown that classes A and B with a predominance of the extraversion factor included mainly (79 %) operators with a level of professional success below average. On the contrary, classes C, D and E with a predominance of the intelligence factor consisted mainly (81 %) of operators with average and above average levels of professional success. It is noteworthy that the average value of intelligence factor in one of the classes consisting of operators, advantageously with lower professional success rate (class B) was the same or even 10 T-scores higher in comparison with the classes represented mainly by operators whose success rate was assessed from medium to high.

Conclusion: Factors of extraversion and intelligence are associated with the quality of performance of professional duties by the NPP control room operators under normal operating conditions. At the same time, the success of their professional activity depends not so much on the quantitative values for these factors, but on their ratio, namely: the predominance of the intelligence factor is prognostically favorable.

Key words: nuclear power plant, operators, main control room, extraversion, intelligence, success of professional activity, 

psychological professional selection

For citation: Kosenkov AA. The Ratio of the Extraversion and Fluid Intelligence Levels as a Predictor of the Operators’ Successful Professional Activity. Medical Radiology and Radiation Safety 2021;66(5):18-22.


DOI: 10.12737/1024-6177-2021-66-5-18-22


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 PDF (RUS) Full-text article (in Russian)


Conflict of interest. The author declare no conflict of interest.

Financing. The study had no sponsorship.

Contribution. Article was prepared by one author

Article received: 23.12.2020. 

Accepted for publication: 20.01.2021.