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Collaboratively Setting Daily Step Goals with a Virtual Coach: Using Reinforcement Learning to Personalize Initial Proposals

Dierikx, M. (author), Albers, N. (author), Scheltinga, Bouke (author), Brinkman, W.P. (author)

Goal-setting is commonly used in behavior change applications for physical activity. However, for goals to be effective, they need to be tailored to a user’s situation (e.g., motivation, progress). One way to obtain such goals is a collaborative process in which a healthcare professional and client set a goal together, thus making use of the...

conference paper 2024

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Persuading to Prepare for Quitting Smoking with a Virtual Coach: Using States and User Characteristics to Predict Behavior

Albers, N. (author), Neerincx, M.A. (author), Brinkman, W.P. (author)

Despite their prevalence in eHealth applications for behavior change, persuasive messages tend to have small effects on behavior. Conditions or states (e.g., confidence, knowledge, motivation) and characteristics (e.g., gender, age, personality) of persuadees are two promising components for more effective algorithms for choosing persuasive...

conference paper 2023

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Resto Quest – A Serious Game on the Restorative Effects of Immersive Virtual Environments

Chen, Weilun (author), Hoogerwaard, Conchita Martin (author), Lim, Jeffrey (author), Polderdijk, Tim (author), Saveur, Tom (author), Wali, Asror (author), Brinkman, Suzanne (author), van der Ham, Ineke J.M. (author), Bidarra, Rafael (author)

Mostly, restorative environments, like parks and forests, are only thought of in the real world. However, one can wonder whether their restorative effects translate to a virtual world; and whether the environment itself makes any difference. In order to assess the possible translation of restorative properties from the real world to a virtual...

conference paper 2023

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Attitudes Toward a Virtual Smoking Cessation Coach: Relationship and Willingness to Continue

Albers, N. (author), Neerincx, M.A. (author), Aretz, N.L. (author), Ali, M. (author), Ekinci, A. (author), Brinkman, W.P. (author)

Virtual coaches have the potential to address the low adherence common to eHealth applications for behavior change by, for example, providing motivational support. However, given the multitude of factors affecting users’ attitudes toward virtual coaches, more insights are needed on how such virtual coaches can be designed to affect these...

conference paper 2023

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The artificial-social-agent questionnaire: Establishing the long and short questionnaire versions

Fitrianie, S. (author), Bruijnes, M. (author), Li, Fengxiang (author), Abdulrahman, A. (author), Brinkman, W.P. (author)

We present the ASA Questionnaire, an instrument for evaluating human interaction with an artificial social agent (ASA), resulting from multi-year efforts involving more than 100 Intelligent Virtual Agent (IVA) researchers worldwide. It has 19 measurement constructs constituted by 90 items, which capture more than 80% of the constructs...

conference paper 2022

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Reusable Virtual Coach for Smoking Cessation and Physical Activity Coaching

Baccinelli, Walter (author), van der Burg, Sven (author), Richardson, Robin (author), Scheltinga, Bouke (author), Albers, N. (author), Smits, Djura (author), Geng, Cunliang (author), Brinkman, W.P. (author), Reenalda, Jasper (author)

Smoking tobacco and physical inactivity are key preventable behavioural risk factors of cardiovascular disease (CVD). Computerised coaching systems can help individuals to modify risky behaviours, thereby preventing CVD. However, most reported eHealth or computerized coaching systems are hard to reuse in slightly different settings. To provide...

conference paper 2022

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METSIS: Hyperlocal Wind Nowcasting for U-space

Sun, Junzi (author), Sunil, Emmanuel (author), Koerse, Ralph (author), van Selling, Stijn (author), van Doorn, Jan-Willem (author), Brinkman, Thomas (author)

The METeo Sensors in the Sky (METSIS) project, funded by SESAR’s Engage knowledge transfer network, investigated the use of drones as an aerial wind sensor network for U-space applications. The concept aims to provide accurate, lowcost and hyperlocal wind nowcasts for drones using data collected by drones themselves and the Meteo-Particle Model ...

conference paper 2021

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Virtual Reality and Collaborative Learning in Higher Education: A Research Thesis Proposal

van der Meer, N. (author), Brinkman, W.P. (author), Specht, M.M. (author)

For the past forty years, research has revealed many ways in which Computer-Supported Collaborative Learning (CSCL) can be utilized to support and enhance education. Similarly, Virtual Reality (VR) technology has proven promising for different educational purposes. These affordances, however, tend to change when the technology behind them...

conference paper 2021

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A Design Pattern Language for Hybrid Intelligent Teams

Tajaddini, M. (author), Brinkman, W.P. (author), ten Teije, Annette (author), Neerincx, M.A. (author)

The field of Hybrid Intelligence (HI) is like a vast land with many tribes that speak different languages. Our goal is to develop a lingua franca to unify the peoples of the HI land.We expect our language to facilitate documentation and communication of research results and thus collaboration among various HI fields by making use of design...

conference paper 2021

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Reinforcement Learning-Based Persuasion by a Conversational Agent for Behavior Change

Albers, N. (author), Neerincx, M.A. (author), Brinkman, W.P. (author)

conference paper 2021

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Questionnaire Items for Evaluating Artificial Social Agents - Expert Generated, Content Validated and Reliability Analysed

Fitrianie, S. (author), Bruijnes, M. (author), Li, Fengxiang (author), Brinkman, W.P. (author)

In this paper, we report on the multi-year Intelligent Virtual Agents (IVA) community effort, involving more than 90 researchers worldwide, researching the IVA community interests and practice in evaluating human interaction with an artificial social agent (ASA). The joint efforts have previously generated a unified set of 19 constructs that...

conference paper 2021

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The 19 Unifying Questionnaire Constructs of Artificial Social Agents: An IVA Community Analysis

Fitrianie, S. (author), Bruijnes, M. (author), Richards, Deborah (author), Bönsch, Andrea (author), Brinkman, W.P. (author)

In this paper, we report on the multi-year Intelligent Virtual Agents (IVA) community effort, involving more than 80 researchers worldwide, researching the IVA community interests and practises in evaluating human interaction with an artificial social agent (ASA). The effort is driven by previous IVA workshops and plenary IVA discussions...

conference paper 2020

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What are we measuring anyway? A literature survey of questionnaires used in studies reported in the intelligent virtual agent conferences

Bruijnes, M. (author), Fitrianie, S. (author), Richards, Deborah (author), Abdulrahman, A. (author), Brinkman, W.P. (author)

Research into artificial social agents aims at constructing these agents and at establishing an empirically grounded understanding of them, their interaction with humans, and how they can ultimately deliver certain outcomes in areas such as health, entertainment, and education. Key for establishing such understanding is the community’s...

conference paper 2019

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What are we measuring anyway?: -A literature survey of questionnaires used in studies reported in the intelligent virtual agent conferences

Fitrianie, S. (author), Bruijnes, M. (author), Richards, Deborah (author), Abdulrahman, A. (author), Brinkman, W.P. (author)

Research into artificial social agents aims at constructing these agents and at establishing an empirically grounded understanding of them, their interaction with humans, and howthey can ultimately deliver certain outcomes in areas such as health, entertainment, and education. Key for establishing such understanding is the community's ability...

conference paper 2019

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Reliability Updating with Survival Information for Dike Slope Stability Using Fragility Curves

Schweckendiek, T. (author), van der Krogt, M.G. (author), Teixeira, Ana (author), Kanning, W. (author), Brinkman, Rob (author), Rippi, Katerina (author)

Dikes and levees play a crucial role in flood protection. The main causes of levee failures are of geotechnical nature. Geotechnical failure modes are also the main contributors to the probability of failure of flood defenses such as levees due to the large uncertainties in ground conditions. Hence, information on ground conditions and soil...

conference paper 2017

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The Effect Of 3D Audio And Other Audio Techniques On Virtual Reality Experience

Brinkman, W.P. (author), Hoekstra, A.R.D. (author), Van Egmond, R. (author)

Three studies were conducted to examine the effect of audio on people's experience in a virtual world. The first study showed that people could distinguish between mono, stereo, Dolby surround and 3D audio of a wasp. The second study found significant effects for audio techniques on people's self-reported anxiety, presence, and spatial...

conference paper 2015

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On the Generic Utilization of Probabilistic Methods for Quantification of Uncertainty in Process-based Morhpodynamic Model Applications

Scheel, F. (author), De Boer, W.P. (author), Brinkman, R. (author), Luijendijk, A.P. (author), Ranasinghe, R.W.M.R.J.B. (author)

A variety of uncertainty sources are inherent in process-based morphodynamic modelling applications. There is an increasing demand for the quantification of these uncertainties. This contribution introduces a probabilistic-morphodynamic (PM) modelling framework that enables this quantification. The PM modelling framework provides a systematic...

conference paper 2014

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Utilizing the Potential of the Affected Population and Prevalent Mobile Technology during Disaster Response: Propositions for a Literature Survey

Gunawan, L.T. (author), Fitrianie, S. (author), Brinkman, W.P. (author), Neerincx, M.A. (author)

Despite the growing awareness of the untapped potential of the affected population in a disaster situation, their inclusion in a disaster management is extremely limited. This study aims to survey the literature to see whether utilizing the affected people and prevalent mobile technology can be used during disaster response. The idea is to...

conference paper 2012

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Cybersickness and anxiety in virtual environments

Ling, Y. (author), Brinkman, W.P. (author), Nefs, H.T. (author), Qu, C. (author), Heynderickx, I.E.J.R. (author)

The question whether feelings of anxiety are confounded with cybersickness in studies on virtual reality exposure therapy (VRET) was raised since the questionnaires used to measure them contain overlapping items. In the experiment, 88 participants were asked to talk in front of a virtual audience. Previous research has shown that this task may...

conference paper 2011

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Design and evaluation of a virtual environment for the treatment of anger

Brinkman, W.P. (author), Hattangadi, N. (author), Meziane, Z. (author), Pul, P. (author)

Cognitive-behavioural therapy is often used for anger treatment. An important element of this therapy is exposure to anger evoking stimuli. In this paper virtual reality is put forward as a technology that can effectively create these stimuli by exposing patients to social scenes that include anger stressors such as aggressive dialogues with...

conference paper 2011