Kenyatta graft war: Experts smell 'lies' in lie detector

A man undergoes a polygraph test. Lawyer Nelson Havi tweeted on Saturday that the legal admissibility of polygraph machines stands on shaky ground. PHOTO | BBC

What you need to know:

  • After the government’s directive on Monday that all government procurement officers should step aside to allow fresh vetting, the polygraph is sure to gain currency.

  • But even as the president vouches for the devices to aid the vetting of top government officials, psychologists are sceptical of their ability to produce actionable results.

  • Because the machines are made to test human conditions which can never be the same for everyone, those who study the human mind believe polygraphs should be treated with a pinch of salt.

Polygraph: An instrument for the simultaneous electrical or mechanical recording of several involuntary physiological activities including blood pressure, skin resistivity, pulse rate, respiration, and perspiration, used especially as a lie detector.

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