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Analyzing Scientific Evidence: From Validity To Reliability With A Two-Step Approach., Renee A. Forinash

St. Mary's Law Journal

Throughout legal history, courts have wrestled with scientific evidence. Sometimes the courts admitted invalid evidence disguised as science. In the 1920’s, courts developed a very limited standard of admissibility for scientific evidence. Under the Frye test, a scientific expert’s conclusion was inadmissible unless the conclusion was generally accepted by the scientific community. Although this prevented “junk science” from invading courtrooms, it also protected invalid scientific evidence already present in the system and restricted using new, but valid, scientific techniques. In response, many jurisdictions developed more liberal evidentiary standards. The liberal standards averted the “cultural lag” for which Frye was criticized …