Evolutionary rationale of manifestation of personality traits to vocal expression

Previous research in the field of vocal expression in relation to personality variables slightly uncovered some acoustic parameters that correlate with personality characteristics in different models of personality. However, just few studies have examined antisocial personality characteristics including also Dark triad traits. The Dark triad itself is a relatively new concept that has not been studied in relation to the acoustic parameters. This explorative study examines the correlation between acoustic parameters of the voice spectrum and personality traits of Dark Triad, NEO-FFI and Self-deception. For this research were selected voice samples in the form of prolonged phonation vocals / a /, / e /, / i /, / o /, / u /, reading of text, and neutral spontaneous description. Research was attended by 66 participants who completed personality questionnaires SD3, NEO-FFI and SDQ. From an acoustic perspective were measured 21 parameters describing voice quality in software PRAAT. Data analysis revealed significant correlations between personality traits and some acoustic parameters. As an important parameters have showed HNR, jitter and shimmer. The results confirm that certain personality traits are manifested through the human voice. The actual mechanism of influences on voice in this work was only..