“…In this context, several questionnaires have been developed to assess the perception of social robots and their personality [12,13,14], but, to the best of our knowledge, no study has employed measures commonly used for assessing human personality to evaluate robot personality. To this end, we developed an observer-report version of Ashton and Lee's HEXACO-60 [15], which has already been used in HRI to measure personality traits about humans in interaction with robots [16,17,18,19], but never as a tool to assess the perceived personality traits of a humanoid robot. The HEXACO model of personality is a dimensional taxonomy of human personality based on findings from a series of lexical studies [20,21,22] that proposes an organization of individual differences in personality characteristics in terms of six broad trait domains: Extraversion (i.e., tendency to feel positively about oneself, to feel confident and comfortable in social situations, to experience high levels of arousal and energy), Agreeableness (i.e., tendency to forgive the wrongs suffered, to be lenient in judging others, to be open to compromise and cooperation), Conscientiousness (i.e., tendency to be organized, disciplined, accurate, and reliable in performing tasks), Emotionality (i.e., tendency to experience negative affects such as anxiety, worry, fear, and stress), Openness to Experience (i.e., tendency to appreciate beauty, art, and unusual ideas and people, and to be curious about various domains of knowledge), and Honesty-Humility (i.e., tendency to avoid manipulation and deception for personal gain and to feel little interest for wealth, luxuries, and social status).…”