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View article: A dynamic Bayesian network approach to modeling engagement and walking behavior: insights from a yearlong micro-randomized trial ( <i>Heartsteps II</i> )
A dynamic Bayesian network approach to modeling engagement and walking behavior: insights from a yearlong micro-randomized trial ( <i>Heartsteps II</i> ) Open
The results demonstrate the benefits of DBNs to model the daily-level idiographic behavioral dynamics of engagement in digital intervention studies. This approach can be leveraged to support the refinement of dynamic theories of behavior c…
View article: Physical activity and diet just-in-time adaptive intervention to reduce blood pressure: a randomized controlled trial
Physical activity and diet just-in-time adaptive intervention to reduce blood pressure: a randomized controlled trial Open
Mobile health interventions for behavioral change require large-scale studies to ensure their clinical benefits. We conducted a randomized controlled trial of patients with hypertension to assess the myBPmyLife application in promoting phy…
View article: Improving Affective Associations With Physical Activity via a Message-Based mHealth Intervention (WalkToJoy): Proof-of-Concept Study
Improving Affective Associations With Physical Activity via a Message-Based mHealth Intervention (WalkToJoy): Proof-of-Concept Study Open
Background Traditional mobile health interventions for physical activity (PA) primarily rely on reflective self-regulatory processes, often neglecting the role of affective associations in sustaining long-term engagement. The WalkToJoy int…
View article: Optimizing and Testing an Individualized and Adaptive Physical Activity Digital Health Intervention: Protocol for a Control Optimization Trial Embedded Within a Randomized Controlled Trial
Optimizing and Testing an Individualized and Adaptive Physical Activity Digital Health Intervention: Protocol for a Control Optimization Trial Embedded Within a Randomized Controlled Trial Open
Background While effective physical activity (PA) interventions exist, interventions often work only for some individuals or only for a limited time. Thus, there is a need for digital health interventions that account for dynamic, idiosync…
View article: Micro-narratives: A Scalable Method for Eliciting Stories of People’s Lived Experience
Micro-narratives: A Scalable Method for Eliciting Stories of People’s Lived Experience Open
Engaging with people's lived experiences is foundational for HCI research and design. This paper introduces a novel narrative elicitation method to empower people to easily articulate 'micro-narratives' emerging from their lived experience…
View article: Designing Daily Supports for Parent-Child Conversations about Emotion: Ecological Momentary Assessment as Intervention
Designing Daily Supports for Parent-Child Conversations about Emotion: Ecological Momentary Assessment as Intervention Open
Parental emotion coaching approaches that advocate for noticing and validating child emotions can greatly impact children's regulatory abilities. However, in daily life, parents often struggle to apply emotion coaching strategies that they…
View article: Improving Affective Associations With Physical Activity via a Message-Based mHealth Intervention (WalkToJoy): Proof-of-Concept Study (Preprint)
Improving Affective Associations With Physical Activity via a Message-Based mHealth Intervention (WalkToJoy): Proof-of-Concept Study (Preprint) Open
BACKGROUND Traditional mobile health interventions for physical activity (PA) primarily rely on reflective self-regulatory processes, often neglecting the role of affective associations in sustaining long-term engagement. The WalkToJoy in…
View article: Micro-narratives: A Scalable Method for Eliciting Stories of People’s Lived Experience
Micro-narratives: A Scalable Method for Eliciting Stories of People’s Lived Experience Open
Engaging with people’s lived experiences is foundational for HCIresearch and design. This paper introduces a novel narrative elicitationmethod to empower people to easily articulate ‘micro-narratives’emerging from their lived experiences, …
View article: Optimizing and Testing an Individualized and Adaptive Physical Activity Digital Health Intervention: Protocol for a Control Optimization Trial Embedded Within a Randomized Controlled Trial (Preprint)
Optimizing and Testing an Individualized and Adaptive Physical Activity Digital Health Intervention: Protocol for a Control Optimization Trial Embedded Within a Randomized Controlled Trial (Preprint) Open
BACKGROUND While effective physical activity (PA) interventions exist, interventions often work only for some individuals or only for a limited time. Thus, there is a need for digital health interventions that account for dynamic, idiosyn…
View article: Harnessing Causality in Reinforcement Learning With Bagged Decision Times
Harnessing Causality in Reinforcement Learning With Bagged Decision Times Open
We consider reinforcement learning (RL) for a class of problems with bagged decision times. A bag contains a finite sequence of consecutive decision times. The transition dynamics are non-Markovian and non-stationary within a bag. All acti…
View article: Changing hearts and minds: theorizing how, when, and under what conditions three social influence implementation strategies work
Changing hearts and minds: theorizing how, when, and under what conditions three social influence implementation strategies work Open
Background: Opinion leadership, educational outreach visiting, and innovation championing are commonly used strategies to address barriers to implementing innovations and evidence-based practices in healthcare settings. Despite voluminous …
View article: Empowering Diverse Voices: A Scalable Method for Eliciting Micro-Narratives in HCI Health Research.
Empowering Diverse Voices: A Scalable Method for Eliciting Micro-Narratives in HCI Health Research. Open
Engaging with people’s lived experiences is foundational for HCI research, especially in designing and evaluating (mental) healthinterventions. The field has developed a range of methods for eliciting this information (e.g., interviews, pr…
View article: Changing hearts and minds: theorizing how, when, and under what conditions three social influence implementation strategies work
Changing hearts and minds: theorizing how, when, and under what conditions three social influence implementation strategies work Open
Background Opinion leadership, educational outreach visiting, and innovation championing are commonly used strategies to address barriers to implementing innovations and evidence-based practices in healthcare settings. Despite voluminous r…
View article: Text Messages to Promote Physical Activity in Patients With Cardiovascular Disease: A Micro-Randomized Trial of a Just-In-Time Adaptive Intervention
Text Messages to Promote Physical Activity in Patients With Cardiovascular Disease: A Micro-Randomized Trial of a Just-In-Time Adaptive Intervention Open
BACKGROUND: Text messages may enhance physical activity levels in patients with cardiovascular disease, including those enrolled in cardiac rehabilitation. However, the independent and long-term effects of text messages remain uncertain. M…
View article: Conducting Research at the Intersection of HCI and Health: Building and Supporting Teams with Diverse Expertise to Increase Public Health Impact
Conducting Research at the Intersection of HCI and Health: Building and Supporting Teams with Diverse Expertise to Increase Public Health Impact Open
Research at the intersection of human-computer interaction (HCI) and health is increasingly done by collaborative cross-disciplinary teams. The need for cross-disciplinary teams arises from the interdisciplinary nature of the work itself-w…
View article: AI-Assisted Causal Pathway Diagram for Human-Centered Design
AI-Assisted Causal Pathway Diagram for Human-Centered Design Open
This paper explores the integration of causal pathway diagrams (CPD) into\nhuman-centered design (HCD), investigating how these diagrams can enhance the\nearly stages of the design process. A dedicated CPD plugin for the online\ncollaborat…
View article: Did we personalize? Assessing personalization by an online reinforcement learning algorithm using resampling
Did we personalize? Assessing personalization by an online reinforcement learning algorithm using resampling Open
View article: Causal pathway diagrams to understand how implementation strategies work
Causal pathway diagrams to understand how implementation strategies work Open
Implementation strategies are intended to drive change in the complex environments within which implementation occurs, but how they work and under what conditions they work remain poorly understood. This chapter focuses on clarifying how i…
View article: The Digital Therapeutics Real-World Evidence Framework: An Approach for Guiding Evidence-Based Digital Therapeutics Design, Development, Testing, and Monitoring
The Digital Therapeutics Real-World Evidence Framework: An Approach for Guiding Evidence-Based Digital Therapeutics Design, Development, Testing, and Monitoring Open
Digital therapeutics (DTx) are a promising way to provide safe, effective, accessible, sustainable, scalable, and equitable approaches to advance individual and population health. However, developing and deploying DTx is inherently complex…
View article: Understanding “Just-in-Time” States in Behavioral Interventions using System Identification and Data Science Methods
Understanding “Just-in-Time” States in Behavioral Interventions using System Identification and Data Science Methods Open
View article: System Identification of User Engagement in mHealth Behavioral Interventions
System Identification of User Engagement in mHealth Behavioral Interventions Open
View article: CONTEXTUALLY TAILORED TEXT MESSAGES TO AUGMENT CARDIAC REHABILITATION: THE VIRTUAL APPLICATION-SUPPORTED ENVIRONMENT TO INCREASE EXERCISE (VALENTINE) STUDY
CONTEXTUALLY TAILORED TEXT MESSAGES TO AUGMENT CARDIAC REHABILITATION: THE VIRTUAL APPLICATION-SUPPORTED ENVIRONMENT TO INCREASE EXERCISE (VALENTINE) STUDY Open
We previously found text messages (TM) delivered as part of a comprehensive mobile health intervention may augment physical activity levels in patients enrolled in cardiac rehabilitation (CR) during its initiation phase, although optimal T…
View article: A randomized trial of a mobile health intervention to augment cardiac rehabilitation
A randomized trial of a mobile health intervention to augment cardiac rehabilitation Open
View article: Advancing Understanding of Just-in-Time States for Supporting Physical Activity (Project JustWalk JITAI): Protocol for a System ID Study of Just-in-Time Adaptive Interventions
Advancing Understanding of Just-in-Time States for Supporting Physical Activity (Project JustWalk JITAI): Protocol for a System ID Study of Just-in-Time Adaptive Interventions Open
Background Just-in-time adaptive interventions (JITAIs) are designed to provide support when individuals are receptive and can respond beneficially to the prompt. The notion of a just-in-time (JIT) state is critical for JITAIs. To date, JI…
View article: Advancing Understanding of Just-in-Time States for Supporting Physical Activity (Project JustWalk JITAI): Protocol for a System ID Study of Just-in-Time Adaptive Interventions (Preprint)
Advancing Understanding of Just-in-Time States for Supporting Physical Activity (Project JustWalk JITAI): Protocol for a System ID Study of Just-in-Time Adaptive Interventions (Preprint) Open
BACKGROUND Just-in-time adaptive interventions (JITAIs) are designed to provide support when individuals are receptive and can respond beneficially to the prompt. The notion of a just-in-time (JIT) state is critical for JITAIs. To date, J…
View article: Feasibility, Perceived Impact, and Acceptability of a Socially Assistive Robot to Support Emotion Regulation With Highly Anxious University Students: Mixed Methods Open Trial
Feasibility, Perceived Impact, and Acceptability of a Socially Assistive Robot to Support Emotion Regulation With Highly Anxious University Students: Mixed Methods Open Trial Open
Background Mental health difficulties among university students have been rising rapidly over the last decade, and the demand for university mental health services commonly far exceeds available resources. Digital interventions are seen as…
View article: A Text Messaging Intervention for Priming the Affective Rewards of Exercise in Adults: Protocol for a Microrandomized Trial
A Text Messaging Intervention for Priming the Affective Rewards of Exercise in Adults: Protocol for a Microrandomized Trial Open
Background Physical activity is a critical target for health interventions, but effective interventions remain elusive. A growing body of work suggests that interventions targeting affective attitudes toward physical activity may be more e…
View article: Idiographic Dynamic Modeling for Behavioral Interventions with Mixed Data Partitioning and Discrete Simultaneous Perturbation Stochastic Approximation
Idiographic Dynamic Modeling for Behavioral Interventions with Mixed Data Partitioning and Discrete Simultaneous Perturbation Stochastic Approximation Open
This paper presents the use of discrete simultaneous perturbation stochastic approximation (DSPSA) as a routine method to efficiently determine features and parameters of idiographic (i.e. single subject) dynamic models for personalized be…
View article: The Digital Therapeutics Real-World Evidence Framework: An Approach for Guiding Evidence-Based Digital Therapeutics Design, Development, Testing, and Monitoring (Preprint)
The Digital Therapeutics Real-World Evidence Framework: An Approach for Guiding Evidence-Based Digital Therapeutics Design, Development, Testing, and Monitoring (Preprint) Open
UNSTRUCTURED Digital therapeutics (DTx) are a promising way to provide safe, effective, accessible, sustainable, scalable, and equitable approaches to advance individual and population health. However, developing and deploying DTx is inhe…
View article: Assessing the Impact of Context Inference Error and Partial Observability on RL Methods for Just-In-Time Adaptive Interventions
Assessing the Impact of Context Inference Error and Partial Observability on RL Methods for Just-In-Time Adaptive Interventions Open
Just-in-Time Adaptive Interventions (JITAIs) are a class of personalized health interventions developed within the behavioral science community. JITAIs aim to provide the right type and amount of support by iteratively selecting a sequence…