“Overall, we correctly classified 82.2% (truths: 88.9%; lies: 75.6%) of the interviewees as either being truthful or deceptive based on the combined movement in their individual limbs,” the report says. Anderson said: “Our first attempt looked at the extent to which different body parts and body signals indicated deception. It turned out that liars wave their arms more but, again, this is only at the 55% level that you can get from a conventional polygraph. The pay dirt was when we considered total body motion. That turns out to tell truth from lies over 70% of the time.” The use of all-body suits is expensive – they cost about £30,000 – and can be uncomfortable, and Anderson and his colleagues are now looking at low-cost alternatives. These include using motion-sensing technology from computer games, such as the Kinect camera devices developed by Microsoft for the Xbox console.
What is one reason Anderson is looking for alternatives to body suits?
Body suits are costly Body suits will become expensive in the future The new suit is only 82.2% reliable Body suits take a long time to manufacture