Systems and methods for non-intrusive deception detection

A system, comprising:

• a sensing arrangement that collects eye movement data of a subject;
• and
• a control unit in communication with the sensing arrangement, the control unit being configured to:
• compare the eye movement data to one or more baseline measurements of eye movement dynamics, wherein the eye movement data comprises a current intersaccadic drift velocity of the subject and, to compare the eye movement data to the one or more baseline measurements, the control unit is configured to compare the current intersaccadic drift velocity to one or more threshold drift velocities of the one or more baseline measurements;
• and
• responsive to an indication that the eye movement data diverges from one or more of the baseline measurements by a threshold amount corresponding to an indication that the subject is lying, generate an alert for delivery to the subject, wherein when the current intersaccadic drift velocity is below the one or more threshold drift velocities by more than a threshold amount, the control unit generates the alert.

A method of determining whether a subject is lying, the method comprising:

• recording, from the subject with a detection device, eye movement data of one or both of the subject's eyes;
• comparing, with the detection device, the eye movement data to one or more baseline measurements, the comparing comprising:
• determining one or more intersaccadic drift velocities of the subject from the eye movement data, the one or more intersaccadic drift velocities including a current intersaccadic drift velocity;
• and
• comparing the one or more intersaccadic drift velocities to one or more threshold drift velocities of the one or more baseline measurements;
• and
• if the eye movement data, including the one or more intersaccadic drift velocities, diverges from one or more of the baseline measurements by a threshold amount corresponding to an indication that the subject is lying, delivering, with the detection device, an alert to one or both of the subject and an administrator, the delivering comprising sending the alert to a device associated with the subject or the administrator when the current intersaccadic drift velocity is below the one or more threshold drift velocities by more than a threshold amount.