What definition of insanity is used in most states currently?

Question

Quizplus · Accepted Answer

The M'Naghten rule is the most commonly used definition of insanity in most states. It states that a defendant must be so impaired by a mental illness or defect that they did not understand the wrongfulness of their actions or were unable to control their behavior at the time of the offense. The Durham test was used briefly in the mid-twentieth century but has since been abandoned. The ALI standard is used in some states but not universally. The "wild beast" test is an archaic and outdated standard that is no longer used in modern legal systems.

What Definition of Insanity Is Used in Most States Currently