Police officers are trained beforehand with various radar related devices. They know how radars and radar detectors work, and how to find illegal radar detectors in other people’s vehicles. … Even without an RDD, a well-trained police officer can tell if a certain driver is hiding a radar detector inRead More →
The nephelometer is an instrument that measures aerosol light scattering. It detects scattering properties by measuring light scattered by the aerosol and subtracting light scattered by the gas, the walls of the instrument and the background noise in the detector. What is measured in nephelometry? In nephelometry the intensity ofRead More →
According to Goodson, some people who are telling the truth can fail polygraph tests by trying too hard to control their body’s responses. … A 2011 meta-analysis by the American Polygraph Association found that polygraph tests using comparison questions had incorrect outcomes about 15% of the time. Why you shouldRead More →
Most research has focused on specific incident testing. The cumulative research evidence suggests that CQTs detect deception better than chance, but with significant error rates, both of misclassifying innocent subjects (false positives) and failing to detect guilty individuals (false negatives). Can an innocent person fail a polygraph test? The resultsRead More →
Drill a hole. … Fish around with a wire hanger. … Try a stud finder app. … Or just use a stud finder! How do you find a stud without a detector? How to Find a Wall Stud Without a Stud Finder Shine a flashlight at a steep angle againstRead More →