01 Introduction

Updated 4 Oct 2026

Good Design

  • Enhances user efficiency and effectiveness.
  • Boosts engagement, satisfaction, and brand perception.

Bad Design

  • Wastes time and money.
  • Can lead to serious consequences—think medical errors, airplane failures, or even nuclear disasters.

Human-Computer Interaction (HCI) & Interaction Design (ID)

Interaction Design (ID)

  • Focuses on creating intuitive, interactive experiences that fit naturally into daily and professional life.

Human-Computer Interaction (HCI)

  • Studies how people use digital systems and how to improve that interaction.
  • Includes research, prototyping, and usability testing.

How HCI and ID Connect

  • แล้วมันเกี่ยวกันยังไงล่ะ?
    • The boundaries between HCI and ID are increasingly blurred.
    • ID can be seen as an evolution of HCI, expanding beyond digital systems to influence all forms of interaction.