This fully resourced, student-led lesson introduces the Dual Processing Model of thinking and decision making, focusing on System 1 and System 2 thinking. Through inquiry, application, and research evaluation, students explore how we make decisions and the psychological factors influencing our thought processes. Part of the Learning & Cognition unit for the new IB Psychology 2025 specification, this is Lesson 6 in the sequence and builds directly on previous work on memory and cognitive pro