RT Journal Article SR Electronic T1 Quantum of Evidence of Mental Retardation Required of a Defendant in Application Seeking Postconviction Relief JF Journal of the American Academy of Psychiatry and the Law Online JO J Am Acad Psychiatry Law FD American Academy of Psychiatry and the Law SP 112 OP 114 VO 34 IS 1 A1 Ernie Poortinga A1 Melvin Guyer YR 2006 UL http://jaapl.org/content/34/1/112.abstract AB