A polygraph examination conducted in the absence of a reported issue or allegation to investigate whether an examinee has withheld information regarding engagement in behaviors encompassed by the relevant questions that cover specified periods of time. Screening examinations may be designed to investigate both multiple and single types of behavior. The strength of screening examinations is in their utility to develop significant information that is most often not obtainable from any other source. Its weakness is that it is not as powerful an examination as is the specific issue test in terms of validity and reliability. See: Krapohl & Stern (2003).