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2014
Henkel, Z.; Bethel, C. L.; Murphy, R. R.; Srinivasan, V. (2014): Evaluation of Proxemic Scaling Functions for Social Robotics. In: IEEE Transactions on Human-Machine Systems 44 (3), S. 374-385. DOI: 10.1109/THMS.2014.2304075

DOI: https://doi.org/10.1109/THMS.2014.2304075

Abstract: This paper introduces and empirically evaluates two scaling functions to alter a robot’s physical movements based on proximity to a human. Previous research has focused on individual aspects of proxemics, like the appropriate distance to maintain from a human, but has not explored autonomous methods to adapt robot behavior as proximity changes. This paper proposes that robots in a social role should modify their behavior using a continuous function mapped to proximity. The method developed calculates a gain value from proximity readings, which is used to shape the execution of active behaviors on the robot. In order to identify the effects of different mappings from proximity to gain value, two different scaling functions were implemented on an affective search and rescue robot. The findings from a 72 participant study, in a high-fidelity mock disaster site, are examined with attention given to a new measure to determine proxemic awareness. The results indicated that for attributes of intelligence, likability, proxemic awareness, and submissiveness, a logarithmic-based scaling function is preferred over a linear-based scaling function, and over no scaling function. In areas of participant comfort and participant stress, the results indicated both logarithmic and linear scaling functions were preferred to no scaling.

Keywords: Angemessen(heit) (von Technik), Atmospheric measurements, autonomous methods, disasters, emergency services, high-fidelity mock disaster site, Human–robot interaction (HRI), human–robot proxemics, ieee xplore, intelligence attributes, Interpolation, Joints, Lighting, linear-based scaling function, logarithmic-based scaling function, Particle measurements, proxemic awareness, proxemic scaling function evaluation, Proxemics, rescue robots, robot physical movements, Robot sensing systems, search, service robot, Social robotic, social robots, submissiveness attributes
Srinivasan, V.; Bethel, C. L.; Murphy, R. R. (2014): Evaluation of Head Gaze Loosely Synchronized With Real-Time Synthetic Speech for Social Robots. In: IEEE Transactions on Human-Machine Systems 44 (6), S. 767-778. DOI: 10.1109/THMS.2014.2342035

DOI: https://doi.org/10.1109/THMS.2014.2342035

Abstract: This study demonstrates that robots can achieve socially acceptable interactions using loosely synchronized head gaze-speech acts. Prior approaches use tightly synchronized head gaze-speech, which requires significant human effort and time to manually annotate synchronization events in advance, restricts interactive dialog, or requires that the operator acts as a puppeteer. This paper describes how autonomous synchronization of head gaze can be achieved by exploiting affordances in the sentence structure and time delays. A 93-participant user study was conducted in a simulated disaster site. The rescue robot “Survivor Buddy” generated head gaze for a victim management scenario using a 911 dialog. The study used pre- and postinteraction questionnaires to compare the social acceptance level of loosely synchronized head gaze-speech against tightly synchronized head gaze-speech (manual annotation) and no head gaze-speech conditions. The results indicated that for attributes of Self-Assessment Manikin, i.e., Arousal, Robot Likeability, Human-Like Behavior, Understanding Robot Behavior, Gaze-Speech Synchronization, Looking at Objects at Appropriate Times, and Natural Movement, the loosely synchronized head gaze-speech is similar to tightly synchronized head gaze-speech and preferred to the no head gaze-speech case. This study contributes to a fundamental understanding of the role of social head gaze in social acceptance for human-machine interaction, how social gaze can be produced, and promotes practical implementation in social robots.

Keywords: Angemessen(heit) (von Technik), Autonomous generation, autonomous head gaze synchronization, Evaluation, human robot interactions, Human-Machine Interaction, human-robot interaction, Human–robot interaction, ieee xplore, interactive conversation, interactive systems, loosely synchronized head gaze-speech acts, real-time synthetic speech, Real-time systems, rescue robots, Robot kinematics, self-assessment manikin, social head gaze, social robots, speech, Survivor Buddy rescue robot, synchronisation, Synchronization, tightly synchronized head gaze-speech, User study, victim management scenario

2014

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