Systems and methods for detecting truth utilizing biologic data observed during various time periods occurring prior and subsequent to the presentation of a stimulus to a subject and/or prior and subsequent to a volitional action performed by the subject in response to the stimulus. A method for creating a truth or lie scale involving: presenting a stimulus designed to evoke an action to a subject； monitoring a first change in biologic data between a first epoch and a second epoch, the first epoch occurring during presentation of the stimulus, and the second epoch occurring subsequent to presentation of the stimulus； monitoring a second change in biologic data between a second epoch and a third epoch, the third epoch occurring subsequent to the action performed by the subject； and analyzing the monitored data to create the truth or lie scale.
