Masami, Haruto, Yuuta, and Momiji talk about several chapters from Predictably Irrational. The first topic is about anchoring. We will discuss how the information initially presented can influence subsequent judgments and decisions. The next topic is about zero cost. We will talk about people's psychology and situations when they see the words zero = free. Finally, we will discuss how emotions change human behavior. We will discuss how human emotions influence decision-making and judgment.