Conflict of interest disclosure
The lions share of studies located for this review are based on analysis of data provided either by the Woodcock-Johnson Revised (WJ- R) or Woodcock-Johnson III (WJ III). Kevin McGrew is a coauthor of the WJ III, and thus have a financial interest in the instrument.  To the best of my ability (Kevin McGrew) I've tried to conduct this review as objectively as possible.