Patent ID: 7376459
Filing Date: 2008-05-20
Classification: A61B

Abstract:
1. A method of inferring deception comprising: (a) presenting a first item of a plurality of items to a subject, the first item comprising subject matter likely unfamiliar to the subject, the presentation having a first attribute of a plurality of attributes, each of the plurality of items comprising a subject matter which is comprehensible to the subject independent of the plurality of attributes; (b) waiting for a first duration substantially unpredictable by the subject; (c) changing, upon expiration of the first duration, the presentation of the first item from the first attribute to one of a second or third attribute, the second attribute being different from the first attribute, the third attribute being different from the second attribute, wherein the presentation of the first item is more likely to be changed from the first attribute to the third attribute than from the first attribute to the second attribute; (d) recording a first parameter indicative of brain activity of the subject during at least one of the presenting of the first item, waiting, changing, or combinations thereof; (e) presenting a second item of the plurality of items to the subject, the second item comprising subject matter of questionable familiarity to the subject, the presentation having the first attribute; (f) waiting for a second duration substantially unpredictable by the subject; (g) changing, upon expiration of the second duration, the presentation of the second item from the first attribute to one of the second or third attributes, wherein the presentation of the second item is more likely to be changed from the first attribute to the third attribute than from the first attribute to the second attribute; (h) recording a second parameter indicative of brain activity of the subject during at least one of the presenting of the second item, waiting, changing, or combinations thereof; and (i) determining, based on the first and second parameters, whether the subject has prior familiarity with the subject matter of the second item.