State certification of school psychologists.

"Nine questions… were answered by the responsible departments of all 50 states and the District of Columbia." 23 states and the District of Columbia are reported as having certification requirements. General requirements stipulated by states with explicit certification standards are specified in a table. The "majority of states are certifying psychological personnel mainly to assist in the placement of children for special education… . There are encouraging signs that certification requirements are gradually being improved." (PsycINFO Database Record (c) 2010 APA, all rights reserved)