Under the Daubert standard, the factors that may be considered in determining whether the methodology is valid are: (1) whether the theory or technique in question can be and has been tested; (2) whether it has been subjected to peer review and publication; (3) its known or potential error rate; (4)the existence and maintenance of standards controlling its operation; and (5) whether it has attracted widespread acceptance within a relevant scientific community.
 
The Daubert standard is the test currently used in the federal courts and some state courts. In the federal court system, it replaced the Frye standard, which is still used in some states.