Principles of Cognition provides students with an invaluable introduction to the modern science of cognition, blending invaluable insights from behavioral and neuroscientific studies of humans and other animals with unique examples, cutting-edge research summaries, and real-world applications. This accessible textbook builds on the legacy of psychologist William James by emphasizing not only the form cognition takes in laboratory research but also the functional dynamics of cognitive processes in everyday life and the ways they vary across individuals and species. Using an integrative approach that highlights the relevance of cognition across psychological disciplines, it engages students by showing how cognition emerges over time, how cognitive abilities can be improved, and how thinking can be upended by something as simple as falling in love.