232 страниц. 2013 год. LAP Lambert Academic Publishing This document has been edited from its original form. Segments of the Introduction (Chapter 1) and Review of Literature (Chapter 2) were changed primarily for formatting reasons. This included the removal of assumptions, definitions of terms, relevance to educational leadership (as defined by my institution) and summary. All summaries were removed from each chapter. Other changes were in page formatting, numbering and the location of tables, graph, equations and figures. No changes have, or had been made to the other chapters, most notably method and results.