Learning Objectives By the end of this study module, you will be able to: Identify the core psychological laws governing human-computer interaction (HCI). Mathematically calculate decision-time variables using Hick’s Law. Apply Gestalt principles to create a visual hierarchy in web layouts. Implement strategic color theory to influence user emotions and conversions. Minimize cognitive load through standardized mental models (Jakob's Law). Module 1: Decision-Making & Memory Laws 1.1 Hick’s Law (The Law of Choice) Theory: The time required to make a decision is a result of the number of possible options. Mathematical Formula: $$T = b \cdot \log_2(n + 1)$$ T: Response time. n: Number of choices. b: Processing speed constant (varies by user). Professional Application: Menu Design: Instead of a single massive dropdown, use "Mega Menus" or "Categorized Tabs." Onboarding: Use "Progressive Disclosure." Don't show every feature at once; show only ...