Cited by 29Social Robot Interaction and HRIHuman-Automation Interaction and SafetyRobot Manipulation and Learning

Trust Dynamics and Verbal Assurances in Human Robot Physical Collaboration

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Alhaji, Basel, Prilla, Michael, Rausch, Andreas·2021·Frontiers in Artificial Intelligence

Abstract

Trust is the foundation of successful human collaboration. This has also been found to be true for human-robot collaboration, where trust has also influence on over- and under-reliance issues. Correspondingly, the study of trust in robots is usually concerned with the detection of the current level of the human collaborator trust, aiming at keeping it within certain limits to avoid undesired consequences, which is known as trust calibration. However, while there is intensive research on human-robot trust, there is a lack of knowledge about the factors that affect it in synchronous and co-located teamwork. Particularly, there is hardly any knowledge about how these factors impact the dynamics of trust during the collaboration. These factors along with trust evolvement characteristics are prerequisites for a computational model that allows robots to adapt their behavior dynamically based on the current human trust level, which in turn is needed to enable a dynamic and spontaneous cooperation. To address this, we conducted a two-phase lab experiment in a mixed-reality environment, in which thirty-two participants collaborated with a virtual CoBot on disassembling traction batteries in a recycling context. In the first phase, we explored the (dynamics of) relevant trust factors during physical human-robot collaboration. In the second phase, we investigated the impact of robot’s reliability and feedback on human trust in robots. Results manifest stronger trust dynamics while dissipating than while accumulating and highlight different relevant factors as more interactions occur. Besides, the factors that show relevance as trust accumulates differ from those appear as trust dissipates. We detected four factors while trust accumulates (perceived reliability, perceived dependability, perceived predictability, and faith) which do not appear while it dissipates. This points to an interesting conclusion that depending on the stage of the collaboration and the direction of trust evolvement, different factors might shape trust. Further, the robot’s feedback accuracy has a conditional effect on trust depending on the robot’s reliability level. It preserves human trust when a failure is expected but does not affect it when the robot works reliably. This provides a hint to designers on when assurances are necessary and when they are redundant.

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  • Some authors use correlations between perceived trustworthiness and system capabilities to measure calibration; larger correlation indicates better calibration.

    “Some authors work with correlations to get a better sense of perceived trustworthiness and system capabilities [5,12,24,39,66,67,81,94,130,139,142].Here the larger the correlation between perceived trustworthiness and system capabilities, the better the calibration.”

    From Measuring and Understanding Trust Calibrations for Automated Systems: A Survey of the State-Of-The-Art and Future Directions (2023) · cites this paper as [5]

    The Results, under “Reliability Manipulation (TD)” (page unavailable), use Spearman correlations to relate reported trust to factors including perceived reliability, predictability, and dependability. But these are correlations with rated trust factors, not a measure comparing perceived trustworthiness with actual system capabilities; the paper does not say that a larger correlation indicates better calibration. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Alhaji et al. showed system feedback was redundant when the system performed well.

    “Yet, Alhaji et al. [5] could show that system feedback was redundant when the system performed well.”

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Research works printed but not linked: 4

  1. Lee John. D. See K. A. (2004). Trust in Automation: Designing for Appropriate Reliance. Human Factors 31. 15151155
  2. Madsen M. Gregor S., (2000). “ Measuring Human-Computer Trust,” in Proceedings of the 11 Th Australasian Conference on Information Systems. pp. 6– 8.
  3. Muir B. M. (1989). Operators’ Trust in and Use of Automatic Controllers in a Supervisory Process Control Task. Ottawa: National Library of Canada. 10.5962/bhl.title.46570 · DOI
  4. Vongbunyong S. Chen W. H. (2015). Disassembly Automation, Sustainable Production, Life Cycle Engineering and Management. Cham: Springer International Publishing. 10.1007/978-3-319-15183-0 · DOI

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Authors
Alhaji, B., Prilla, M., & Rausch, A.
Affiliations
Clausthal University of Technology (DE)
Corresponding author
Alhaji, Basel
Venue
Frontiers in Artificial Intelligence
Published
2021-07-20
Volume
4
Pages
703504-703504
ISSN
2624-8212 (ISSN-L)
OpenAlex
W3185427831
Cited by
29
References
72
Citations by year
2026: 9 · 2025: 8 · 2024: 8 · 2023: 3 · 2021: 1
FWCI
2.94
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Artificial Intelligence (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Publikationsserver der Technischen Universität Clausthal (submittedVersion, cc-by)
Funders
Technische Universität Clausthal
Topics
  • Social Sciences › Psychology › Social Psychology › Social Robot Interaction and HRI
  • Social Sciences › Psychology › Social Psychology › Human-Automation Interaction and Safety
  • Physical Sciences › Engineering › Control and Systems Engineering › Robot Manipulation and Learning
Keywords
trust in robots, trust dynamics, trust calibration, robot reliability, robot feedback, perceived predictability, mixed reality, battery disassembly, recycling

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