Typically, how long does a polygraph examination last?

A polygraph examination typically lasts about an hour. This duration includes the time spent preparing the individual for the test, explaining the process, conducting the actual examination, and gathering results. The preparation phase involves establishing a rapport with the subject, reviewing questions, and ensuring they understand the procedure. The testing itself can take anywhere from 30 to 60 minutes depending on the complexity of the questions and the individual's responses.

The brief time frame allows for an efficient assessment without causing undue stress or fatigue to the individual being tested, which could affect the accuracy of the results. While longer examinations are possible in certain scenarios—for instance, if additional questioning is required—such circumstances are exceptions rather than the norm.