Jason T. Hustedt, PhD, W. Steven Barnett, PhD
University of Delaware & National Institute for Early Education Research, Rutgers University, USA
April 2017, 2nd rev. ed.
Janet Currie, PhD
University of California, USA
April 2009, Rev. ed.
Edward Zigler, PhD
Sterling Professor of Psychology, Emeritus, Yale University, USA
Cheri A. Vogel, PhD, Yange Xue, PhD
Mathematica Policy Research, USA
October 2018, Rev. ed.