Systems and methods for non-intrusive deception detection

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

• obtaining eye movement data of one or both of the subject's eyes;
• identifying a current intersaccadic drift velocity from the eye movement data;
• comparing, with a control unit, the current intersaccadic drift velocity of the eye movement data to a threshold drift velocity;
• and
• when the comparison indicates that the current intersaccadic drift velocity is below the threshold drift velocity by more than a threshold amount, corresponding to an indication that the subject is lying, delivering, with the control unit, an alert to a device associated with one or more of the subject and an administrator,
• wherein the threshold drift velocity is part of one or more bio-signatures each corresponding to one of one or more response conditions, wherein one of the one or more response conditions is a deceptive answer to a question.

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

• obtaining baseline eye movement data during one of a known deceptive condition or a known non-deceptive condition;
• calculating a threshold drift velocity from the baseline eye movement data;
• obtaining eye movement data of one or both of the subject's eyes;
• identifying a current intersaccadic drift velocity from the eye movement data;
• comparing, with a control unit, the current intersaccadic drift velocity of the eye movement data to the threshold drift velocity;
• and
• when the comparison indicates that the current intersaccadic drift velocity is below the threshold drift velocity by more than a threshold amount, corresponding to an indication that the subject is lying, delivering, with the control unit, an alert to a device associated with one or more of the subject and an administrator.

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

• obtaining eye movement data of one or both of the subject's eyes;
• identifying a current intersaccadic drift velocity from the eye movement data;
• comparing, with a control unit, the current intersaccadic drift velocity of the eye movement data to a threshold drift velocity;
• and
• when the comparison indicates that the current intersaccadic drift velocity is below the threshold drift velocity by more than a threshold amount, corresponding to an indication that the subject is lying, delivering, with the control unit, an alert to a device associated with one or more of the subject and an administrator,
• wherein identifying the current intersaccadic drift velocity from the eye movement data includes identifying the current intersaccadic drift velocity when the subject is responding to a question.