This book is based on an in-depth filmed conversation between Howard Burton and neuroscientist John Duncan, University of Cambridge, and examines fascinating questions in neuroscience such as: What is intelligence and what does IQ testing tell us? Can intelligence be measured and improved? What role does our frontal lobe play in executive control? John Duncan has rigorously investigated these types of issues for years and this conversation covers all those questions plus topics such as impairments following brain damage, functional brain imaging, and the brain basis for attention, intelligence and cognitive control. This carefully-edited book includes an introduction, Thinking Deeper, and questions for discussion at the end of each chapter:I. Searching For A Definition - A curious correlationII. Trusting Your Gut - Intuitions and contradictionsIII. Paradigmatic Examples - Some test are more g-relevant than othersIV. Different Types of Knowledge - Crystallized vs. fluidV. Another Correlation - The power of organizationVI. Selecting Solutions - Finding focusVII. Looking Inside - Harnessing modern technologyVIII. Implications - Future possibilitiesIX. Assessing the Landscape - Reactions and speculationsX. Pure and Applied - Bringing it all homeAbout Ideas Roadshow Conversations Series: This book is part of an expanding series of 100+ Ideas Roadshow conversations, each one presenting a wealth of candid insights from a leading expert in a focused yet informal setting to give non-specialists a uniquely accessible window into frontline research and scholarship that wouldn't otherwise be encountered through standard lectures and textbooks. For other books in this series visit website: https://ideasroadshow.com/.