Competing Technologies

The classification of human deception by No Lie MRI™ software is far superior to all other methods, including polygraphs, event-related potentials (ERPs), high-definition thermal imaging, and other visual technologies used on the face.

Polygraph testing was widely used up through the mid 1980s. The polygraph measures whether an individual is in a state of autonomic nervous arousal, which occurs when a person is anxious, fearful, or angry. While these are potential indications that a person is not telling the truth, they are confounded with other potential explanations (such as being anxious about the process of being tested!). In addition, when the results are interpreted by a human operator, the process is vulnerable to operator error.

In addition, polygraph testing can only be performed for 15 minutes at a time. After 15 minutes blood circulation is cut off due to the pressure casued by the monitoring cuff and the cuff must be removed. This limits the type of testing that can be performed.

While 80% accuracy estimates were promoted by practitioners of polygraph testing, the market for polygraph testing diminished greatly after independent studies in the 1990s estimated its accuracy at only around 60%, barely better than guessing. In 2003 the National Academies of Science published a report which stated categorically that polygraph testing should not be used.
"The Polygraph and Lie Detection". Report of the Committee to Review the Scientific Evidence on the Polygraph of the National Academies of the U.S. The National Academies Press. Washington, D.C. 2003.
High-definition thermal imaging
While they claim a 78% accuracy rating, the accuracy is at or less than that of polygraphs (60%).

Voice technology
Accuracy is at or less than that of a polygraph (60%).

Near-Infrared Spectroscopy
NIRS attempts to detect the “bold” signal in the brain of oxygen use. This technology is in the early stages of development, it is not a mature technology. Also the specificity of NIRS may be poor for cognitive paradigms. Regardless if and when this technology becomes more developed it is covered by the University of Pennsylvania patent to which No Lie MRI, Inc. has exclusive worldwide rights.

Electroencephalogram (EEG) technology does not have any spatial resolution. It has not been independently studied.

An Evoked Response Potential (ERP) is a signal from an EEG. It is a correlate of brain electrochemical activity and has a high temporal resolution. A P-3 wave appears in respons to rare and meaningful stimuli with 300-1000 ms latency. However the brain source cannot be uniquely localized, and the test is really for "salience" not truth or lies.

Response time
Difficult to measure and use.

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