Positing A Sense of Agency-Aware Persuasive AI - Its Theoretical and Computational Frameworks -- Designing Effective Dialogue Content for a Virtual Coaching Team Using the Interaction Process Analysis and Interpersonal Circumplex Models -- Towards Adaptive Robotic Tutors in Universities: A Field Study -- Predicting Exercise Adherence and Physical Activity in Older Adults Based on Tablet Engagement: A Post Hoc Study -- Towards an Automatic Generation of Persuasive Messages -- Persuasive Social Robot using Reward Power over Repeated Instance of Persuasion -- Planning Habit: Daily Planning Prompts with Alexa -- Emotional Feedback to Mitigate Aggressive Driving: A Real-World Driving Study -- Mobile Persuasive Application for Responsible Alcohol Use: Drivers for Use and Impact of Social Influence Strategies -- Improving Context-Aware Habit-Support Interventions Using Egocentric Visual Contexts -- Disparate Impact Diminishes Consumer Trust Even for Advantaged Users -- Towards Better Rating Scale Design : An Experimental Analysis on the Influence of User Preference and Visual Cues on User Response -- From Persuasive to Credible: Which User Perceptions of Persuasive Design Elements Influence Perceived Credibility -- Exploring the Impact of Persuasive Features on Customer Satisfaction Levels of E-Commerce Websites Based on the Kano Model -- The Role of Emotional Expression in Behavior Change Coaching by a Social Robot -- Exploring the Impact of Color on User Ratings: A Personality and Culture-Based Approach -- Making Them Use It: User Perceptions that Determine the Acceptance of Persuasive Interventions for Child Healthcare -- A Systematic Review of Persuasive Strategies in Mobile E-Commerce Applications and Their Implementations -- Using Inspiration Cards for Designing Persuasive Technology to Improve Creative Situations -- Users Want Diverse, Multiple, and Personalized Behavior Change Support: Need-Finding Survey -- Theory-Informed Design Guidelines for Shared Decision Making Tools for Health Behaviour Change -- Perceptions of Ethics in Persuasive User Interfaces -- The Fine Line between Persuasion and Digital Addiction -- Defining Features of Behavior Design - and Where to Go Next -- Do we Need User Manuals for Persuasive Systems or are the Systems Supposed to be Self-Explanatory.

This book constitutes the refereed post-conference proceedings of the 16th International Conference on Persuasive Technology, PERSUASIVE 2021, held as a virtual event, in April 2021. The 17 full papers presented in this book together with 8 short papers were carefully reviewed and selected from 67 submissions. The papers are grouped in topical sections as follows: persuasive affective technology; digital marketing, ecommerce, etourism and smart ecosystems; and persuasion and education.