Table 1

Factors Governing the Admissibility of Expert Evidence in Four Cases

Frye	Mohan	Daubert	J. (L.‐J.)
General acceptability	Relevance Necessity		Relevance Necessity
	Absence of exculpatory rule Properly qualified expert	Whether the theory or technique can be and has been tested
		Whether the theory or technique has been subjected to peer review and publication	Absence of exclusionary ruleProperly qualified expert
		The known or potential rate of error or the existence of standards	Whether the theory or technique can be and has been tested
		Whether the theory or technique used has been generally accepted	Whether the theory or technique has been subjected to peer review and publication
			The known or potential rate of error or the existence of standards
			Whether the theory or technique used has been generally accepted