The United States Supreme Court in Daubert v. Merrell Dow Pharmaceutic
als (1993) directed federal trial judges to preliminarily evaluate the
scientific bases of proffered expert evidence. This article presents
a decision flowchart for evaluating psychometric data, and attempts to
operationalize existing evidentiary standards in hybrid (part science
/part law) terms. The resulting framework should better assist courts
and forensic experts to understand, evaluate, and apply scientific rea
soning in determining the admissibility and probative value of psychom
etric evidence.