The article "Persuasive Systems Design: Key Issues, Process Model, and System Features" by Harri Oinas-Kukkonen and Marja Harjumaa from the University of Oulu, Finland, explores the design and evaluation of persuasive systems. The authors propose a framework called Persuasive Systems Design (PSD) to guide the development of systems that can change users' attitudes or behaviors. They discuss seven underlying postulates of persuasive systems, including the non-neutral nature of information technology, the importance of cognitive consistency, and the use of direct and indirect persuasion strategies. The article also delves into the analysis of the persuasion context, which involves understanding the intent, event, and strategies of persuasion. Additionally, it outlines 28 design principles for persuasive system content and functionality, categorized into primary task, dialogue, system credibility, and social support. The authors provide a practical example using the Nike+ running system to illustrate how these principles can be applied in real-world systems. The article concludes by emphasizing the importance of considering persuasion principles as requirements for software qualities and the need for further experimental work to validate the framework's applicability.The article "Persuasive Systems Design: Key Issues, Process Model, and System Features" by Harri Oinas-Kukkonen and Marja Harjumaa from the University of Oulu, Finland, explores the design and evaluation of persuasive systems. The authors propose a framework called Persuasive Systems Design (PSD) to guide the development of systems that can change users' attitudes or behaviors. They discuss seven underlying postulates of persuasive systems, including the non-neutral nature of information technology, the importance of cognitive consistency, and the use of direct and indirect persuasion strategies. The article also delves into the analysis of the persuasion context, which involves understanding the intent, event, and strategies of persuasion. Additionally, it outlines 28 design principles for persuasive system content and functionality, categorized into primary task, dialogue, system credibility, and social support. The authors provide a practical example using the Nike+ running system to illustrate how these principles can be applied in real-world systems. The article concludes by emphasizing the importance of considering persuasion principles as requirements for software qualities and the need for further experimental work to validate the framework's applicability.