Roger P. Phelps is Professor Emeritus of Music and Music Education at New York University. He was a primary contributor in the previously published A Guide to Research in Music Education, 4th Edition. Ronald H. Sadoff is Assistant Professor of Music at New York University. Edward C. Warburton is an Assistant Professor of Dance Education at University of California, Santa Cruz. Lawrence Ferrara is Professor and Chair at the Department of Music and Performing Arts at New York University. He was a primary contributor in the previously published A Guide to Research in Music Education, 4th Edition.