“…Those who work in Atkins ‐type cases have identified several potential limitations or unanswered questions about the validity of existing adaptive functioning measures for use in capital cases, including whether self‐report formats are appropriate, deciding who is an appropriate informant for providing information needed to score an adaptive functioning measure, and whether existing measures are appropriate for those with antisocial traits (e.g., Brodsky & Galloway, ; Denkowski & Denkowski, , ; Everington & Olley, ; Fabian, ; Greenspan & Switzky, ; Olley & Cox, ; Stevens & Price, ; Tasse, ; Widaman & Siperstein, ). Indeed, Widaman and Siperstein () have argued that the appropriate assessment of adaptive functioning is the issue that involves “the most debate in Atkins ‐type cases” (p. 8).…”