Do I Have a Personality? Endowing Care Robots with Context-Dependent Personality Traits

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Do I Have a Personality? Endowing Care Robots with Context-Dependent Personality Traits Antonio Andriella1 · Henrique Siqueira2 · Di Fu2,3,4 · Sven Magg2 · Pablo Barros2 · Stefan Wermter2 · Carme Torras1 · Guillem Alenyà1 Accepted: 5 August 2020 © The Author(s) 2020

Abstract Recent studies have revealed the key importance of modelling personality in robots to improve interaction quality by empowering them with social-intelligence capabilities. Most research relies on verbal and non-verbal features related to personality traits that are highly context-dependent. Hence, analysing how humans behave in a given context is crucial to evaluate which of those social cues are effective. For this purpose, we designed an assistive memory game, in which participants were asked to play the game obtaining support from an introvert or extroverted helper, whether from a human or robot. In this context, we aim to (i) explore whether selective verbal and non-verbal social cues related to personality can be modelled in a robot, (ii) evaluate the efficiency of a statistical decision-making algorithm employed by the robot to provide adaptive assistance, and (iii) assess the validity of the similarity attraction principle. Specifically, we conducted two user studies. In the human–human study (N=31), we explored the effects of helper’s personality on participants’ performance and extracted distinctive verbal and non-verbal social cues from the human helper. In the human–robot study (N=24), we modelled the extracted social cues in the robot and evaluated its effectiveness on participants’ performance. Our findings showed that participants were able to distinguish between robots’ personalities, and not between the level of autonomy of the robot (Wizard-of-Oz vs fully autonomous). Finally, we found that participants achieved better performance with a robot helper that had a similar personality to them, or a human helper that had a different personality. Keywords Robot personalities · Human–human interaction · Human–robot interaction

1 Introduction Antonio Andriella and Henrique Siqueira have contributed equally to this work.

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Antonio Andriella [email protected] Henrique Siqueira [email protected] Di Fu [email protected]

There is no single definition of the term personality. Feist and Feist [26] define personality as “a pattern of relatively permanent traits and unique characteristics that give both consistency and individuality to a person’s behaviour”. We know from daily interactions that people’s perception and behaviour are mediated by their personalities. Personality is derived from both biological and social factors. Its impact and

Sven Magg [email protected]

1

Pablo Barros [email protected]

Institut de Robòtica i Informàtica Industrial, CSIC-UPC, C/Llorens i Artigas 4-6, 08028 Barcelona, Spain

2

Knowledge Technology Department of Informatics, University of Hamburg, Vogt-Koelln-Str 30, 22527 Hamburg, Germany

3

CAS Key Laboratory of Behavioural Science, Institute