Abstract
The aim of the present study was to examine the association between personality (the big five factors of personality and self-esteem), subjective well-being (life satisfaction) and the natural killer (NK) cell activity in a sample of 98 young (20–30 years old) healthy human volunteers (49 women and 49 men). Personality traits were determined by means of the revised NEO Personality Inventory (NEO PI-R) and the Self-Concept (AF5) questionnaires; subjective well-being was evaluated via the Satisfaction With Life Scale (SWLS), and the cytotoxic activity of NK cells against human tumor cells K562 was assessed using a commercial kit. The results revealed that: (1) participants scoring low in neuroticism-related traits [anxiety, social anxiety and impulsivity] showed higher NK activity (p
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