The recognition of acted interpersonal stance in police interrogations and the influence of actor proficiency

This paper reports on judgement studies regarding the perception of interpersonal stances taken by humans playing the role of a suspect in a police interrogation setting. Our project aims at building believable embodied conversational characters to play the role of suspects in a serious game for lea...

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Bibliographic Details
Published in:	Journal on multimodal user interfaces Vol. 9; no. 4; pp. 353 - 376
Main Authors:	Bruijnes, Merijn, op den Akker, Rieks, Spitters, Sophie, Sanders, Merijn, Fu, Quihua
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Springer Berlin Heidelberg 01-12-2015
Subjects:	Computer Science Image Processing and Computer Vision Original Paper Signal,Image and Speech Processing User Interfaces and Human Computer Interaction Affect expression Interpersonal stance Data reliability Body language Embodied conversational agents
Online Access:	Get full text
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Summary:	This paper reports on judgement studies regarding the perception of interpersonal stances taken by humans playing the role of a suspect in a police interrogation setting. Our project aims at building believable embodied conversational characters to play the role of suspects in a serious game for learning interrogation strategies. The main question we ask is: do human judges agree on the way they perceive the various aspects of stance taking, such as friendliness and dominance? Four types of stances were acted by eight amateur actors. Short recordings were shown in an online survey to subjects who were asked to describe them using a selection of a number of adjectives. Results of this annotation task are reported in this paper. We explain how we computed the inter-rater agreement with Krippendorff’s alpha statistics using a set theoretical distance metric. Results show that for some of the stance types observers agreed more than for others. Some actors are better than others, but validity (recognizing the intended stance) and inter-rater agreement do not always go hand in hand. We further investigate the effect the expertise of actors has on the perception of the stance that is acted. We compare the fragments from amateur actors to fragments from professional actors taken from popular TV-shows.
ISSN:	1783-7677 1783-8738
DOI:	10.1007/s12193-015-0189-0