| Variable or group |
Description |
| Independent variables (traits of the Dark Triad) |
| Machiavellianism |
Trait «Machiavellianism » from the Dark Triad of personality |
| Narcissism |
Trait «narcissism» from the Dark Triad of personality |
| Psychopathy |
Trait «psychopathy» from the Dark Triad of personality |
| Groups divided by levels of each independent variable |
| Mac 1, Mac 2, Mac 3 |
corresponding to low, medium and high levels of Machiavellianism respectively |
| Nar 1, Nar 2, Nar 3 |
corresponding to low, medium and high levels of narcissism respectively |
| Psy 1, Psy 2, Psy 3 |
corresponding to low, medium and high levels of psychopathy respectively |
| Dependent variables (indicators of the work efficiency) |
| Ef1 |
Completeness – completeness of execution of functional responsibilities and job discipline |
| Ef2 |
Creativity – creativity at work |
| Ef3 |
Jointness – jointness of work, the effectiveness of professional interaction with colleagues and managers |
| Ef4 |
Competence – professional competence, the practical application of professional knowledge, skills and experience |
| Ef5 |
Motivation – internal work motivation, the practical expression of interest to the current work as a kindergarten teacher |
| TE |
Total efficiency – total work efficiency, defined as the arithmetic average of the five indicators (Ef1– Ef5) |
| Other controlled variables |
| Age |
Age (years) |
| WE |
Work experience – specific professional experience, i.e., work experience as a kindergarten teacher (years) |
