Jaap Ham - RankMe

104 papers A* 5A 1B 41Journal 37Unranked 17

Year	Rank	Type	Title / Venue / Authors
2026	—	`conf`	Future Directions for Behavior Change Support Systems. BCSS M. Sriram Iyengar, Rosanna E. Guadagno, Alberto F. Olivieri, Jaap Ham, Harri Oinas-Kukkonen
2025	J	`jnl`	Audiovisual Affective Design of Humanoid Robot Appearance and Voice Based on Kansei Engineering. Int. J. Soc. Robotics Mingming Li, Jia Zhang, Fu Guo, Yanyan Liao, Xiaolei Hu, Jaap Ham
2025	J	`jnl`	Editorial introduction. Behav. Inf. Technol. Alexander Meschtscherjakov, Cees J. H. Midden, Jaap Ham
2025	J	`jnl`	Effects of Chatbots with Anthropomorphic Visual and Auditory Cues on Users' Affective Preference: Evidence from Event-Related Potentials. Int. J. Hum. Comput. Interact. Jiahao Chen, Fu Guo, Zeyu Zhang, Xiaohui Tian, Jaap Ham
2025	J	`jnl`	Human-chatbot interaction studies through the lens of bibliometric analysis. Univers. Access Inf. Soc. Jiahao Chen, Fu Guo, Zenggen Ren, Xueshuang Wang, Jaap Ham
2025	—	`conf`	Investigating the Effects of Implicit and Explicit Personalization on Perceived Credibility. BCSS Felix Nti Koranteng, Isaac Wiafe, Jaap Ham, Uwe Matzat
2025	J	`jnl`	Social Robots as Decision-Making Companions: Exploring the Impact of Social Cues on Human Responses. Int. J. Humanoid Robotics Aimi Shazwani Ghazali, Hariz Hafizalshah, Shahrul Naim Sidek, Hazlina Md Yusof, Jaap Ham
2025	J	`jnl`	The Impact of Social Support Strategies on Users' Credibility Perceptions and Continuous Use Intentions of Academic Social Networking Sites. An Empirical Study. Int. J. Hum. Comput. Interact. Felix Nti Koranteng, Uwe Matzat, Isaac Wiafe, Jaap Ham
2024	J	`jnl`	'How Would you Score Yourself?': The Effect of Self-assessment Strategy Through Robots on Children's Motivation and Performance in Piano Practice. Int. J. Soc. Robotics Heqiu Song, Konstantinos Tsiakas, Jaap Ham, Panos Markopoulos, Emilia I. Barakova
2024	—	`conf`	A serious game for promoting sustainable food choices. PERSUASIVE (Adjunct) Peter A. M. Ruijten, Jaap Ham, Nienke de Jongh
2024	B	`conf`	Can Robots Enhance the Learning Experience by Making Music More Fun? RO-MAN Gabriella Tisza, Heqiu Song, Panos Markopoulos, Emilia I. Barakova, Jaap Ham
2024	J	`jnl`	Different dimensions of anthropomorphic design cues: How visual appearance and conversational style influence users' information disclosure tendency towards chatbots. Int. J. Hum. Comput. Stud. Jiahao Chen, Mingming Li, Jaap Ham
2024	J	`jnl`	Effects of Anthropomorphic Design Cues of Chatbots on Users' Perception and Visual Behaviors. Int. J. Hum. Comput. Interact. Jiahao Chen, Fu Guo, Zenggen Ren, Mingming Li, Jaap Ham
2024	B	`conf`	How the Role of a Persuasive Robot Impacts One's Attitude Towards It. PERSUASIVE Peter A. M. Ruijten, Jin Smeding, Jaap Ham
2024	—	`conf`	Preface to the 7th International Workshop on Personalizing Persuasive Technologies. PERSUASIVE (Adjunct) Ifeoma Adaji, Kiemute Oyibo, Rita Orji, Jaap Ham, Alaa Alslaity
2024	J	`jnl`	The impact of social robots' presence and roles on children's performance in musical instrument practice. Br. J. Educ. Technol. Heqiu Song, Emilia I. Barakova, Jaap Ham, Panos Markopoulos
2023	—	`conf`	"I Know What They Are Trying...!" - The Influence of Awareness of Persuasive Strategy Usage on Phishing Email Recognition Accuracy. PERSUASIVE (Adjunct) Asal Hojjati, Jaap Ham
2023	—	`conf`	Adaptive and Personalized Persuasive Technologies (ADAPPT 2023) Workshop. UMAP (Adjunct Publication) Kiemute Oyibo, Ifeoma Adaji, Rita Orji, Jaap Ham, Julita Vassileva
2023	B	`conf`	Credibility in Persuasive Systems: A Systematic Review. PERSUASIVE Felix Nti Koranteng, Uwe Matzat, Isaac Wiafe, Jaap Ham
2023	—	`conf`	Design and Evaluation of a Persuasive Road Marking System for Controlling Speeding Behavior. MindTrek Isaac Wiafe, Elikem Doe Atsakpo, Charles Nutrokpor, Jaap Ham, Stephen R. Gulliver
2023	J	`jnl`	Effects of robot gaze and voice human-likeness on users' subjective perception, visual attention, and cerebral activity in voice conversations. Comput. Hum. Behav. Mingming Li, Fu Guo, Xueshuang Wang, Jiahao Chen, Jaap Ham
2023	—	`conf`	How Social Robots can Influence Motivation as Motivators in Learning: A Scoping Review. PETRA Heqiu Song, Shiyuan Huang, Emilia I. Barakova, Jaap Ham, Panos Markopoulos
2023	B	`ed.`	Persuasive Technology - 18th International Conference, PERSUASIVE 2023, Eindhoven, The Netherlands, April 19-21, 2023, Proceedings PERSUASIVE Alexander Meschtscherjakov, Cees J. H. Midden, Jaap Ham
2022	B	`conf`	Learning Musical Instrument with the Help of Social Robots: Attitudes and Expectations of Teachers and Parents. RO-MAN Heqiu Song, Maria Deetman, Panos Markopoulos, Jaap Ham, Emilia I. Barakova
2022	J	`jnl`	Persuasion-Induced Physiology as Predictor of Persuasion Effectiveness. IEEE Trans. Affect. Comput. Hanne A. A. Spelt, Chao Zhang, Joyce H. D. M. Westerink, Jaap Ham, Wijnand A. IJsselsteijn
2022	J	`jnl`	Physiology-based personalization of persuasive technology: a user modeling perspective. User Model. User Adapt. Interact. Hanne A. A. Spelt, Joyce H. D. M. Westerink, Lily Frank, Jaap Ham, Wijnand A. IJsselsteijn
2022	—	`conf`	Preface to the 6th International Workshop on Personalizing Persuasive Technologies. PERSUASIVE (Adjunct) Ifeoma Adaji, Kiemute Oyibo, Rita Orji, Jaap Ham, Oladapo Oyebode
2022	J	`jnl`	Psychophysiological Reactions to Persuasive Messages Deploying Persuasion Principles. IEEE Trans. Affect. Comput. Hanne Spelt, Joyce H. D. M. Westerink, Jaap Ham, Wijnand A. IJsselsteijn
2022	B	`conf`	Supporting to be Credible: Investigating Perceived Social Support as a Determinant of Perceived Credibility. PERSUASIVE Felix Nti Koranteng, Jaap Ham, Uwe Matzat, Isaac Wiafe
2022	J	`jnl`	The effect of an artificial agent's vocal expressiveness on immediacy and learning. J. Comput. Assist. Learn. Sofia Fountoukidou, Uwe Matzat, Jaap Ham, Cees J. H. Midden
2022	J	`jnl`	The role of usability, aesthetics, usefulness and primary task support in predicting the perceived credibility of academic social networking sites. Behav. Inf. Technol. Felix Nti Koranteng, Jaap Ham, Isaac Wiafe, Uwe Matzat
2021	—	`conf`	Adaptive and Personalized Persuasive Technologies. UMAP (Adjunct Publication) Kiemute Oyibo, Ifeoma Adaji, Rita Orji, Jaap Ham, Julita Vassileva
2021	B	`conf`	Investigating User Perceptions of Persuasive Design Elements that Influence Perceived Credibility. PERSUASIVE Felix Nti Koranteng, Jaap Ham, Isaac Wiafe
2021	B	`conf`	Making Them Use It: User Perceptions that Determine the Acceptance of a Persuasive Interventions for Child Healthcare. PERSUASIVE Sitwat Langrial, Jaap Ham, Fannah Al-Fannah Al Araimi
2021	J	`jnl`	Personalizing HRI in Musical Instrument Practicing: The Influence of Robot Roles (Evaluative Versus Nonevaluative) on the Child's Motivation for Children in Different Learning Stages. Frontiers Robotics AI Heqiu Song, Emilia I. Barakova, Panos Markopoulos, Jaap Ham
2021	—	`conf`	Towards Human-Centered Design of Workplace Health Stimulation Interventions: Investigation of Factors Contributing to Office Workers' Exercise Behavior. IHIET (Strasbourg) Tianmei Zhang, Jaap Ham
2020	B	`conf`	Learning to Stop Smoking: Understanding Persuasive Applications' Long-Term Behavior Change Effectiveness Through User Achievement Motivation. PERSUASIVE Jaap Ham, Sitwat Usman Langrial
2020	B	`conf`	Mobile-based Text Messages for Improved Pediatric Health in Rural Areas of Pakistan: A Qualitative Study. PERSUASIVE Sitwat Usman Langrial, Jaap Ham
2020	—	`conf`	Personalizing Persuasive Technologies Workshop 2020. PERSUASIVE (Adjunct) Rita Orji, Jaap Ham, Kiemute Oyibo, Joshua C. Nwokeji, Oladapo Oyebode
2020	J	`jnl`	Persuasive Robots Acceptance Model (PRAM): Roles of Social Responses Within the Acceptance Model of Persuasive Robots. Int. J. Soc. Robotics Aimi Shazwani Ghazali, Jaap Ham, Emilia I. Barakova, Panos Markopoulos
2020	A*	`conf`	Robot Role Design for Implementing Social Facilitation Theory in Musical Instruments Practicing. HRI Heqiu Song, Zhiping Zhang, Emilia I. Barakova, Jaap Ham, Panos Markopoulos
2019	J	`jnl`	Assessing the effect of persuasive robots interactive social cues on users' psychological reactance, liking, trusting beliefs and compliance. Adv. Robotics Aimi Shazwani Ghazali, Jaap Ham, Emilia I. Barakova, Panos Markopoulos
2019	B	`conf`	Effects of a Virtual Model's Pitch and Speech Rate on Affective and Cognitive Learning. PERSUASIVE Sofia Fountoukidou, Uwe Matzat, Jaap Ham, Cees J. H. Midden
2019	J	`jnl`	Effects of an artificial agent as a behavioral model on motivational and learning outcomes. Comput. Hum. Behav. Sofia Fountoukidou, Jaap Ham, Uwe Matzat, Cees J. H. Midden
2019	A*	`conf`	Investigating the Effect of Social Cues on Social Agency Judgement. HRI Aimi Shazwani Ghazali, Jaap Ham, Panos Markopoulos, Emilia I. Barakova
2019	J	`jnl`	Perceived Human-Likeness of Social Robots: Testing the Rasch Model as a Method for Measuring Anthropomorphism. Int. J. Soc. Robotics Peter A. M. Ruijten, Antal Haans, Jaap Ham, Cees J. H. Midden
2019	J	`jnl`	Psychophysiological Measures of Reactance to Persuasive Messages Advocating Limited Meat Consumption. Inf. Hanne Spelt, Elisabeth Kersten-van Dijk, Jaap Ham, Joyce Westerink, Wijnand A. IJsselsteijn
2018	B	`conf`	Cardiovascular Reactions During Exposure to Persuasion Principles. PERSUASIVE Hanne Spelt, Joyce Westerink, Jaap Ham, Wijnand A. IJsselsteijn
2018	J	`jnl`	Effects of Robot Facial Characteristics and Gender in Persuasive Human-Robot Interaction. Frontiers Robotics AI Aimi Shazwani Ghazali, Jaap Ham, Emilia I. Barakova, Panos Markopoulos
2018	B	`ed.`	Persuasive Technology - 13th International Conference, PERSUASIVE 2018, Waterloo, ON, Canada, April 18-19, 2018, Proceedings PERSUASIVE Jaap Ham, Evangelos Karapanos, Plinio P. Morita, Catherine M. Burns
2018	B	`conf`	Poker Face Influence: Persuasive Robot with Minimal Social Cues Triggers Less Psychological Reactance. RO-MAN Aimi Shazwani Ghazali, Jaap Ham, Emilia I. Barakova, Panos Markopoulos
2018	—	`ed.`	Proceedings of the Third International Workshop on Personalization in Persuasive Technology co-located with the 13th International Conference on Persuasive Technology, PPT@PERSUASIVE 2018, Waterloo, Canada, April 16, 2018. PPT@PERSUASIVE Rita Orji, Maurits Kaptein, Jaap Ham, Kiemute Oyibo, Joshua C. Nwokeji
2018	—	`ed.`	Symbiotic Interaction - 6th International Workshop, Symbiotic 2017, Eindhoven, The Netherlands, December 18-19, 2017, Revised Selected Papers Symbiotic Jaap Ham, Anna Spagnolli, Benjamin Blankertz, Luciano Gamberini, Giulio Jacucci
2018	J	`jnl`	The influence of social cues in persuasive social robots on psychological reactance and compliance. Comput. Hum. Behav. Aimi Shazwani Ghazali, Jaap Ham, Emilia I. Barakova, Panos Markopoulos
2018	B	`conf`	Using an Artificial Agent as a Behavior Model to Promote Assistive Technology Acceptance. PERSUASIVE Sofia Fountoukidou, Jaap Ham, Uwe Matzat, Cees J. H. Midden
2017	B	`conf`	Pardon the rude robot: Social cues diminish reactance to high controlling language. RO-MAN Aimi Shazwani Ghazali, Jaap Ham, Emilia I. Barakova, Panos Markopoulos
2017	—	`conf`	Persuasive Virtual Touch: The Effect of Artificial Social Touch on Shopping Behavior in Virtual Reality. Symbiotic Yuguang Zhao, Jaap Ham, Jurgen van der Vlist
2017	J	`jnl`	Special issue on supporting a healthier lifestyle with e-coaching systems. Pers. Ubiquitous Comput. Robbert-Jan Beun, Joel Anderson, Jaap Ham, Michel C. A. Klein, Anne Roefs, Joyce Westerink
2017	—	`conf`	The Influence of Social Cues and Controlling Language on Agent's Expertise, Sociability, and Trustworthiness. HRI (Companion) Aimi Shazwani Ghazali, Jaap Ham, Emilia I. Barakova, Panos Markopoulos
2017	—	`conf`	Using Tailoring to Increase the Effectiveness of a Persuasive Game-Based Training for Novel Technologies. PPT@PERSUASIVE Sofia Fountoukidou, Jaap Ham, Cees J. H. Midden, Uwe Matzat
2016	J	`jnl`	Ambiguous Agents: The Influence of Consistency of an Artificial Agent's Social Cues on Emotion Recognition, Recall, and Persuasiveness. Int. J. Hum. Comput. Interact. Peter A. M. Ruijten, Cees J. H. Midden, Jaap Ham
2016	—	`conf`	Finding Kairos: The Influence of Context-Based Timing on Compliance with Well-Being Triggers. Symbiotic Jaap Ham, Jef van Schendel, Saskia Koldijk, Evangelia Demerouti
2016	B	`conf`	Investigating the Differences in Effects of the Persuasive Message's Timing During Science Learning to Overcome the Cognitive Dissonance. ICSR Youssef Khaoula, Jaap Ham, Michio Okada
2016	B	`conf`	Investigating the Effects of the Persuasive Source's Social Agency Level and the Student's Profile to Overcome the Cognitive Dissonance. ICSR Youssef Khaoula, Jaap Ham, Michio Okada
2016	B	`conf`	Red Radiators Versus Red Tulips: The Influence of Context on the Interpretation and Effectiveness of Color-Based Ambient Persuasive Technology. PERSUASIVE Shengnan Lu, Jaap Ham, Cees J. H. Midden
2015	J	`jnl`	Combining Robotic Persuasive Strategies: The Persuasive Power of a Storytelling Robot that Uses Gazing and Gestures. Int. J. Soc. Robotics Jaap Ham, Raymond H. Cuijpers, John-John Cabibihan
2015	B	`conf`	Conforming to an Artificial Majority: Persuasive Effects of a Group of Artificial Agents. PERSUASIVE Cees J. H. Midden, Jaap Ham, Joey Baten
2015	B	`conf`	Does Trigger Location Matter? The Influence of Localization and Motivation on the Persuasiveness of Mobile Purchase Recommendations. PERSUASIVE Frank Basten, Jaap Ham, Cees J. H. Midden, Luciano Gamberini, Anna Spagnolli
2015	J	`jnl`	Lonely and Susceptible: The Influence of Social Exclusion and Gender on Persuasion by an Artificial Agent. Int. J. Hum. Comput. Interact. Peter A. M. Ruijten, Cees J. H. Midden, Jaap Ham
2015	B	`conf`	Persuasive Technology Based on Bodily Comfort Experiences: The Effect of Color Temperature of Room Lighting on User Motivation to Change Room Temperature. PERSUASIVE Shengnan Lu, Jaap Ham, Cees J. H. Midden
2015	—	`ch.`	Shall I Show You Some Other Shirts Too? The Psychology and Ethics of Persuasive Robots. A Construction Manual for Robots' Ethical Systems Jaap Ham, Andreas Spahn
2015	J	`jnl`	Trusting a Virtual Driver That Looks, Acts, and Thinks Like You. Hum. Factors Frank M. F. Verberne, Jaap Ham, Cees J. H. Midden
2014	J	`jnl`	A Persuasive Robot to Stimulate Energy Conservation: The Influence of Positive and Negative Social Feedback and Task Similarity on Energy-Consumption Behavior. Int. J. Soc. Robotics Jaap Ham, Cees J. H. Midden
2014	A*	`conf`	Introducing a rasch-type anthropomorphism scale. HRI Peter A. M. Ruijten, Diane H. L. Bouten, Dana C. J. Rouschop, Jaap Ham, Cees J. H. Midden
2014	B	`conf`	Investigating the Influence of Social Exclusion on Persuasion by a Virtual Agent. PERSUASIVE Peter A. M. Ruijten, Jaap Ham, Cees J. H. Midden
2014	J	`jnl`	Preface to the special issue on personalization and behavior change. User Model. User Adapt. Interact. Judith Masthoff, Floriana Grasso, Jaap Ham
2014	B	`conf`	Using Ambient Lighting in Persuasive Communication: The Role of Pre-existing Color Associations. PERSUASIVE Shengnan Lu, Jaap Ham, Cees J. H. Midden
2013	J	`jnl`	Cross-cultural study on human-robot greeting interaction: acceptance and discomfort by Egyptians and Japanese. Paladyn J. Behav. Robotics Gabriele Trovato, Massimiliano Zecca, Salvatore Sessa, Lorenzo Jamone, Jaap Ham, Kenji Hashimoto, Atsuo Takanishi
2013	A*	`conf`	Goal inferences about robot behavior: goal inferences and human response behaviors. HRI Hedwig Anna Theresia Broers, Jaap Ham, Ron Broeders, P. Ravindra De Silva, Michio Okada
2013	B	`conf`	I Didn't Know That Virtual Agent Was Angry at Me: Investigating Effects of Gaze Direction on Emotion Recognition and Evaluation. PERSUASIVE Peter A. M. Ruijten, Cees J. H. Midden, Jaap Ham
2013	J	`jnl`	Representing Affective Facial Expressions for Robots and Embodied Conversational Agents by Facial Landmarks. Int. J. Soc. Robotics Caixia Liu, Jaap Ham, Eric O. Postma, Cees J. H. Midden, Bart Joosten, Martijn Goudbeek
2013	J	`jnl`	Robots Sing the Body Electric: Investigations of Body Language for Social and Spatial Interaction. Int. J. Soc. Robotics Jaap Ham, Vanessa Evers, Manja Lohse
2013	J	`jnl`	The Car that Looks Like Me: Similarity Cues can Increase Trust in the Self-Driving Cars of the Future. ERCIM News Frank M. F. Verberne, Jaap Ham, Cees J. H. Midden
2013	B	`conf`	Towards culture-specific robot customisation: A study on greeting interaction with Egyptians. RO-MAN Gabriele Trovato, Massimiliano Zecca, Salvatore Sessa, Lorenzo Jamone, Jaap Ham, Kenji Hashimoto, Atsuo Takanishi
2013	B	`conf`	Trusting Digital Chameleons: The Effect of Mimicry by a Virtual Social Agent on User Trust. PERSUASIVE Frank M. F. Verberne, Jaap Ham, Aditya Ponnada, Cees J. H. Midden
2012	B	`conf`	How to Make a Robot Smile? Perception of Emotional Expressions from Digitally-Extracted Facial Landmark Configurations. ICSR Caixia Liu, Jaap Ham, Eric O. Postma, Cees J. H. Midden, Bart Joosten, Martijn Goudbeek
2012	B	`conf`	The Automaticity of Social Behavior towards Robots: The Influence of Cognitive Load on Interpersonal Distance to Approachable versus Less Approachable Robots. ICSR Jaap Ham, Mirjam van Esch, Yvonne Limpens, Jente de Pee, John-John Cabibihan, Shuzhi Sam Ge
2012	B	`conf`	The Illusion of Agency: The Influence of the Agency of an Artificial Agent on Its Persuasive Power. PERSUASIVE Cees J. H. Midden, Jaap Ham
2012	J	`jnl`	Trust in Smart Systems: Sharing Driving Goals and Giving Information to Increase Trustworthiness and Acceptability of Smart Systems in Cars. Hum. Factors Frank M. F. Verberne, Jaap Ham, Cees J. H. Midden
2011	B	`conf`	Making Robots Persuasive: The Influence of Combining Persuasive Strategies (Gazing and Gestures) by a Storytelling Robot on Its Persuasive Power. ICSR Jaap Ham, René Bokhorst, Raymond H. Cuijpers, David van der Pol, John-John Cabibihan
2011	B	`conf`	Persuasive power in groups: the influence of group feedback and individual comparison feedback on energy consumption behavior. PERSUASIVE Cees J. H. Midden, Hiroaki Kimura, Jaap Ham, Tatsuo Nakajima, Mieke Kleppe
2011	B	`ed.`	Social Robotics - Third International Conference, ICSR 2011, Amsterdam, The Netherlands, November 24-25, 2011. Proceedings ICSR Bilge Mutlu, Christoph Bartneck, Jaap Ham, Vanessa Evers, Takayuki Kanda
2011	B	`conf`	Unconscious persuasion needs goal-striving: the effect of goal activation on the persuasive power of subliminal feedback. PERSUASIVE Peter A. M. Ruijten, Cees J. H. Midden, Jaap Ham
2011	—	`conf`	User Models for Motivational Systems - The Affective and the Rational Routes to Persuasion. UMAP Workshops Floriana Grasso, Jaap Ham, Judith Masthoff
2011	J	`jnl`	When Artificial Social Agents Try to Persuade People: The Role of Social Agency on the Occurrence of Psychological Reactance. Int. J. Soc. Robotics Maike A. J. Roubroeks, Jaap Ham, Cees J. H. Midden
2010	B	`conf`	A Persuasive Robotic Agent to Save Energy: The Influence of Social Feedback, Feedback Valence and Task Similarity on Energy Conservation Behavior. ICSR Jaap Ham, Cees J. H. Midden
2010	B	`conf`	Ambient Persuasive Technology Needs Little Cognitive Effort: The Differential Effects of Cognitive Load on Lighting Feedback versus Factual Feedback. PERSUASIVE Jaap Ham, Cees J. H. Midden
2010	B	`conf`	What Makes Social Feedback from a Robot Work? Disentangling the Effect of Speech, Physical Appearance and Evaluation. PERSUASIVE Suzanne Vossen, Jaap Ham, Cees J. H. Midden
2009	A*	`conf`	A robot that says bad!: using negative and positive social feedback from a robotic agent to save energy. HRI Jaap Ham, Cees J. H. Midden
2009	B	`conf`	Can ambient persuasive technology persuade unconsciously?: using subliminal feedback to influence energy consumption ratings of household appliances. PERSUASIVE Jaap Ham, Cees J. H. Midden, Femke Beute
2009	B	`conf`	Does it make a difference who tells you what to do?: exploring the effect of social agency on psychological reactance. PERSUASIVE Maike A. J. Roubroeks, Cees J. H. Midden, Jaap Ham
2009	A	`conf`	Evaluating Interface Variants on Personality Acquisition for Recommender Systems. UMAP Greg Dunn, Jurgen Wiersema, Jaap Ham, Lora Aroyo
2009	B	`conf`	Social influence of a persuasive agent: the role of agent embodiment and evaluative feedback. PERSUASIVE Suzanne Vossen, Jaap Ham, Cees J. H. Midden
2009	B	`conf`	Using negative and positive social feedback from a robotic agent to save energy. PERSUASIVE Cees J. H. Midden, Jaap Ham