{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T02:45:41Z","timestamp":1777776341174,"version":"3.51.4"},"reference-count":283,"publisher":"Emerald","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2018,2,22]]},"abstract":"<jats:p>The goal of this survey is to inform the design and usage of nonverbal signals for human-robot interaction. With robots being increasingly utilized for tasks that require them to not only operate in close proximity to humans but to interact with them as well, there has been great interest in the communication challenges associated with the varying degrees of interaction in these environments. The success of such interactions depends on robots\u2019 ability to convey information about their knowledge, intent, and actions to co-located humans. In this work, we present a comprehensive review of literature related to the generation and usage of nonverbal signals that facilitate legibility of non-humanoid robot state and behavior. To motivate the need for these signaling behaviors, we survey literature in human communication and psychology and outline target use cases of non-humanoid robots. Specifically, we focus on works that provide insight into the cognitive processes that enable humans to recognize, interpret, and exploit nonverbal signals. From these use cases, we identify information that is potentially important for non-humanoid robots to signal and organize it into three categories of robot state. We then present a review of signal design techniques to illustrate how signals conveying this information can be generated and utilized. Finally, we discuss issues that must be considered during nonverbal signaling and open research areas, with a focus on informing the design and usage of generalizable nonverbal signaling behaviors for task-oriented non-humanoid robots.<\/jats:p>","DOI":"10.1561\/2300000057","type":"journal-article","created":{"date-parts":[[2018,2,22]],"date-time":"2018-02-22T06:10:21Z","timestamp":1519279821000},"page":"211-323","source":"Crossref","is-referenced-by-count":83,"title":["A Survey of Nonverbal Signaling Methods for Non-Humanoid Robots"],"prefix":"10.1108","volume":"6","author":[{"given":"Elizabeth","family":"Cha","sequence":"first","affiliation":[{"name":"University of Southern California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yunkyung","family":"Kim","sequence":"additional","affiliation":[{"name":"NASA Ames Research Center"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Terrence","family":"Fong","sequence":"additional","affiliation":[{"name":"NASA Ames Research Center"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maja J.","family":"Matari\u0107","sequence":"additional","affiliation":[{"name":"University of Southern California"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"140","published-online":{"date-parts":[[2018,2,22]]},"reference":[{"issue":"4","key":"2026040113104044900_ref001","doi-asserted-by":"crossref","first-page":"273","DOI":"10.2316\/Journal.206.2006.4.206-2909","article-title":"Design and implementation of a service robot for a restaurant","volume":"21","author":"Acosta","year":"2006","journal-title":"International Journal of Robotics & Automation"},{"issue":"3","key":"2026040113104044900_ref002","first-page":"447","article-title":"Human-Robot Interaction Design: Understanding User Needs and Requirements","volume":"49","author":"Adams","year":"2005"},{"key":"2026040113104044900_ref003","article-title":"Shared Mental Models for Human-Robot Teams","author":"Adams","year":"2014","journal-title":"AAAI Fall Symposium on Artificial Intelligence and Human-Robot Interaction"},{"issue":"4","key":"2026040113104044900_ref004","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1145\/3008665.3008669","article-title":"Nonverbal Communication in Socially Assistive Human Robot Interaction","volume":"2","author":"Admoni","year":"2016","journal-title":"AI Matters"},{"key":"2026040113104044900_ref005","first-page":"1983","article-title":"Robot gaze does not reflexively cue human attention","author":"Admoni","year":"2011","journal-title":"CogSci"},{"key":"2026040113104044900_ref006","first-page":"49","article-title":"Deliberate Delays During Robot-to-Human Handovers Improve Compliance With Gaze Communication","volume-title":"ACM\/IEEE International Conference on Human-Robot Interaction (HRI)","author":"Admoni","year":"2014"},{"issue":"3","key":"2026040113104044900_ref007","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1145\/1922649.1922653","article-title":"Human Activity Analysis: A Review","volume":"43","author":"Aggarwal","year":"2011","journal-title":"ACM Computing Surveys"},{"issue":"4","key":"2026040113104044900_ref008","doi-asserted-by":"crossref","first-page":"468","DOI":"10.1086\/518544","article-title":"Is That Car Smiling at Me? 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