Expertise in Jazz Guitar Improvisation is an examination of musical interplay and the ways implicit (sub-conscious) and explicit (conscious) knowledge appear during improvisation. The practice-based research inquiry includes: interviews and interplay with five world-class jazz guitarists, Lage Lund, Jack Wilkins, Ben Monder, Rez Abbasi and Adam Rogers; a modal matrix for analyzing structure, time and form in jazz guitar improvisation, and musical analysis based on cognitive theories. By explaining the cognitive and musical foundations for expertise in jazz guitar improvisation, this book illuminates how jazz guitarists' strategies are crucially dependent on context, style and type of interplay. With accompanying video provided as an e-resource, this material will be of interest to anyone fascinated by Jazz and Psychology of Music.