From the executive summary:
Almost a century of research in scientific psychology and physiology provides little basis for the expectation that a polygraph test could have extremely high accuracy. Although psychological states often associated with deception (e.g., fear of being judged deceptive) do tend to affect the physiological responses that the polygraph measures, these same states can arise in the absence of deception. Moreover, many other psychological and physiological factors (e.g., anxiety about being tested) also affect those responses. Such phenomena make polygraph testing intrinsically susceptible to producing erroneous results. This inherent ambiguity of the physiological measures used in the polygraph suggests that further investments in improving polygraph technique and interpretation will bring only modest improvements in accuracy.
Polygraph research has not developed and tested theories of the underlying factors that produce the observed responses. Factors other than truthfulness that affect the physiological responses being measured can vary substantially across settings in which polygraph tests are used. There is little knowledge about how much these factors influence the outcomes of polygraph tests in field settings. For example, there is evidence suggesting that truthful members of socially stigmatized groups and truthful examinees who are believed to be guilty or believed to have a high likelihood of being guilty may show emotional and physiological responses in polygraph test situations that mimic the responses that are expected of deceptive individuals.
This is for access to our most critical national secrets.
There is NO RIGHT to this info!
It is NOT necessarily about "lying", rather an intent to deceive or withhold.
The gov't has every right to deny you access!