A personal context-aware multi-device coaching service that supports a healthy lifestyle. - Rieks op den Akker; Randy Klaassen; Tine Lavrysen; Gijs Geleijnse; Aart van Halteren; Henk Schwietert; Marloes van der Hout (BCS HCI, 2011)

Opportunities for smart & tailored activity coaching. - Harm op den Akker; Randy Klaassen; Rieks op den Akker; Valerie M. Jones; Hermie J. Hermens (CBMS, 2013)

Feedback presentation for mobile personalised digital physical activity coaching platforms. - Randy Klaassen; Rieks op den Akker; Harm op den Akker (PETRA, 2013)

User preferences for multi-device context-aware feedback in a digital coaching system. - Randy Klaassen; Rieks op den Akker; Tine Lavrysen; Susan van Wissen (J. Multimodal User Interfaces, 2013)

Virtual Coaches for Healthy Lifestyle. - Harm op den Akker; Randy Klaassen; Anton Nijholt (Toward Robotic Socially Believable Behaving Systems (II), 2016)

AIRPlay: Towards a 'Breathgiving' Approach. - Randy Klaassen; Robby van Delden; Miriam Cabrita; Monique Tabak (BCSS@PERSUASIVE, 2017)

Let them play: experiences in the wild with a gamification and coaching system for young diabetes patients. - Rieks op den Akker; Randy Klaassen; Kim C. M. Bul; Pamela M. Kato; Gert Jan van der Burg; Pierpaolo Di Bitonto (PervasiveHealth, 2017)

Designing and Developing Lifelike, Engaging Lifestyle Coaching Agents and Scenarios for Multiparty Coaching Interaction. - Gerwin Huizing; Randy Klaassen; Dirk Heylen (ICAHGCA@AAMAS, 2018)

A Demonstration of Multi-Party Dialogue Using Virtual Coaches: The First Council of Coaches Demonstrator. - Mark Snaith; Harm op den Akker; Tessa Beinema; Merijn Bruijnes; Álvaro Fides-Valero; Gerwin Huizing; Reshmashree B. Kantharaju; Randy Klaassen; Kostas Konsolakis; Dennis Reidsma; Marcel Weusthof (COMMA, 2018)

Design and Evaluation of a Pervasive Coaching and Gamification Platform for Young Diabetes Patients. - Randy Klaassen; Kim C. M. Bul; Rieks op den Akker; Gert Jan van der Burg; Pamela M. Kato; Pierpaolo Di Bitonto (Sensors, 2018)

Integrating Argumentation with Social Conversation between Multiple Virtual Coaches. - Reshmashree B. Kantharaju; Alison Pease; Dennis Reidsma; Catherine Pelachaud; Mark Snaith; Merijn Bruijnes; Randy Klaassen; Tessa Beinema; Gerwin Huizing; Donatella Simonetti; Dirk Heylen; Harm op den Akker (IVA, 2019)

In Body Experiences: Persuasion by Doing. - Randy Klaassen; Robby van Delden; Joanneke VanDerNagel; Matienne van der Kamp; Boony Thio; Dirk Heylen (BCSS@PERSUASIVE, 2019)

VR4VRT: Virtual Reality for Virtual Rowing Training. - Robby van Delden; Sascha Bergsma; Koen Vogel; Dees B. W. Postma; Randy Klaassen; Dennis Reidsma (CHI PLAY (Companion), 2020)

SpiroPlay, a Suite of Breathing Games for Spirometry by Kids & Experts. - Robby van Delden; Danny Plass-Oude Bos; Antje Jacoba Vivian (Vivianne) de With; Koen Vogel; Randy Klaassen; Nynke Zwart; Joyce Faber; Boony Thio; Mattienne van der Kamp (CHI PLAY, 2020)

Multimodal Interactive Dining with the Sensory Interactive Table: Two Use Cases. - Roelof Anne Jelle de Vries; Gijs H. J. Keizers; Sterre R. van Arum; Juliet A. M. Haarman; Randy Klaassen; Robby van Delden; Bert-Jan F. van Beijnum; Janet H. W. van den Boer (ICMI Companion, 2020)

Multi-Perspective Persuasion by a Council of Virtual Coaches. - Gerwin Huizing; Randy Klaassen; Dirk Heylen (BCSS@PERSUASIVE, 2020)

Agents United: An Open Platform for Multi-Agent Conversational Systems. - Tessa Beinema; Daniel P. Davison; Dennis Reidsma; Oresti Banos; Merijn Bruijnes; Brice Donval; Álvaro Fides-Valero; Dirk Heylen; Dennis Hofs; Gerwin Huizing; Reshmashree B. Kantharaju; Randy Klaassen; et al. (IVA, 2021)

Designing Effective Dialogue Content for a Virtual Coaching Team Using the Interaction Process Analysis and Interpersonal Circumplex Models. - Gerwin Huizing; Randy Klaassen; Dirk Heylen (PERSUASIVE, 2021)

"Go up in smoke": Feasibility and initial acceptance of a virtual environment to measure tobacco craving in vulnerable individuals. - Simon Langener; Joanneke VanDerNagel; Randy Klaassen; Paul Van der Valk; Dirk Heylen (SEGAH, 2021)

Objective Quantification of In-Hospital Patient Mobilization after Cardiac Surgery Using Accelerometers: Selection, Use, and Analysis. - Frank R. Halfwerk; Jeroen H. L. van Haaren; Randy Klaassen; Robby van Delden; Peter H. Veltink; Jan G. Grandjean (Sensors, 2021)

On the receptivity of employees to just-in-time self-tracking and eCoaching for stress management: a mixed-methods approach. - Aniek Lentferink; Matthijs L. Noordzij; Anouk Burgler; Randy Klaassen; Youri Derks; Hilbrand Oldenhuis; Hugo Velthuijsen; Lisette van Gemert-Pijnen (Behav. Inf. Technol., 2022)

Eating Event Recognition Using Accelerometer, Gyroscope, Piezoelectric, and Lung Volume Sensors. - Sigert J. Mevissen; Randy Klaassen; Bert-Jan F. van Beijnum; Juliet A. M. Haarman (Sensors, 2024)