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Explainable Agents Through Social Cues: A Review
The issue of how to make embodied agents explainable has experienced a surge
of interest over the last three years, and, there are many terms that refer to
this concept, e.g., transparency or legibility. One reason for this high
variance in terminology is the unique array of social cues that embodied agents
can access in contrast to that accessed by non-embodied agents. Another reason
is that different authors use these terms in different ways. Hence, we review
the existing literature on explainability and organize it by (1) providing an
overview of existing definitions, (2) showing how explainability is implemented
and how it exploits different social cues, and (3) showing how the impact of
explainability is measured. Additionally, we present a list of open questions
and challenges that highlight areas that require further investigation by the
community. This provides the interested reader with an overview of the current
state-of-the-art