Individual differences in the Big Five traits were measured with the Polish version (Topolewska, Skimina, Strus, Cieciuch, & Rowiński, 2014) of the 20-item International Personality Item Pool (Donnellan, Oswald, Baird, & Lucas, 2006), with four items per trait: Openness/Intellect (e.g., “I have a vivid imagination.”), Conscientiousness (e.g., “I get chores done right away.”), Extraversion (e.g., “I am the life of the party.”), Agreeableness (e.g., “I sympathize with others’ feelings.”), Neuroticism (e.g., “I get upset easily.”) where participants were asked their agreement (1 = strongly disagree; 5 = strongly agree). Items were averaged to create indexes of each trait.
Psychopathy was measured with the Polish version (see Rogoza & Cieciuch, 2019) of the Levenson’s Self-Report Psychopathy Scale (Levenson, Kiehl, & Fitzpatrick, 1995). The scale has 17 items (i.e., Factor 1) measuring individual differences in callous, manipulative and selfish use of others (e.g., “For me, what’s right is whatever I can go away with.”) and 10 (i.e., Factor 2) measuring impulsivity and limited behavioral control (e.g., “I find myself in the same kinds of trouble, time after time.”). Participants were asked their agreement (1 = strongly disagree; 4 = strongly agree) with the items which were averaged to create indexes of both factors.
Machiavellianism was measured with the Polish version (Pospiszyl, 2000) of the 20-item MACH-IV (Christie & Geis, 1970), where participants were asked how much they agreed (1 = strongly disagree; 7 = strongly agree) with statements such as: “It is hard to get ahead without cutting corners here and there” and “People suffering from incurable diseases should have the choice of being put painlessly to death.” The items were averaged to create a Machiavellianism index.
Narcissism was measured with the Polish version (Rogoza, Rogoza, & Wyszyńska, 2016) of the Narcissistic Admiration and Rivalry Questionnaire (Back et al., 2013). The scale has nine items measuring individual differences in admiration (e.g., “I show others how special I am.”) and nine measuring rivalry (e.g., “I secretly take pleasure in the failure of my rivals.”) where participants were asked their agreement (1 = disagree completely; 6 = agree completely). Items were averaged to create indexes of each aspect.
Individual differences in the perceptions of the COVID-19 situation were measured with the S8* scale with all 40 items (Rauthman & Sherman, 2016). The scale was translated into Polish by three independent experts and then back-translated into English. The scale has five items for each of the eight dimensions: Duty (e.g., “A job needs to be done.”), Intellect (e.g., “Situation includes intellectual or cognitive stimuli.”), Adversity (e.g., “I am being blamed for something.”), Mating (e.g., “Potential sexual or romantic partners are present.”), pOsitivity (e.g., “The situation is pleasant.”), Negativity (e.g., “The situation could elicit stress.”), Deception(e.g., “It is possible to deceive someone.”), and Sociality (e.g., “Social interaction is possible.”). Participants were asked how much each statement applied (1 = not at all; 7 = totally) to the COVID-19 pandemic. Items were averaged to create indexes of each aspect.
Individual differences in compliance with governmental restrictions to reduce the spread of the COVID-19 virus were measured with a single item (in Polish). Participants reported the percent (1−100) to which they complied with the restrictions implemented by the Polish government. https://www.sciencedirect.com/science/article/pii/S0191886920303883