voluntariness

/ˌvɑːlənˈtɛrinəs/
noun
  1. The state or quality of being done by one's own free choice, not because of force or obligation.
    • Voluntariness is an important principle in medical research involving human subjects.
    • The judge emphasized the voluntariness of the agreement before approving it.
    • The voluntariness of the confession was questioned by the defense lawyer.
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