Law » Courts » Evidence » Admissibility of evidence » Expert and scientific evidence » Must expert evidence be generally acceptable to experts or must the trial court make an independent assessment of the validity and reliability of such evidence? » Trial court must act as gatekeeper and make independent assessment » The expert or scientific evidence must be shown to be reliable » Reliability or unreliability of assorted fields and methods » Social sciences » Psychology and psychiatry » Psychology » Behavioral or "hard" psychology: Whether expert evidence...