“…This challenge may be overcome by drawing on prior research using productivity indices which have been calculated in various ways including a simple numerical tally of how many publications a researcher has published and taking into account an author's position relative to his or her co-authors. The productivity indicator of program prestige has been applied in psychology (Webster, Hall, & Bolen, 1993), education (Hsieh et al, 2004) and school psychology (Davis, Zanger, Gerrard-Morris, Roberts, & Robinson, 2005;Kranzler, Grapin, & Daley, 2011;. Little (1997) published the first study about the most prolific authors publishing in six school psychology journals from 1987 to 1995.…”