President Uhuru Kenyatta on June 1, during the 55th Madaraka Day celebration in Meru, ordered that all accounting and procurement heads in the government undergo a fresh vetting in a bid to tame the rising graft cases.

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He proposed the use of a lie-detector technology which the officials will be subjected to within the next 30 days, with the test failures set to be sacked from their positions.

Many Kenyans are however not conversant with the technology and how it operates.

Here is how it works;

The person taking the polygraph test has 4 to 6 sensors attached to him, reports the Citizen Digital. The examiner then asks 3 or 4 soft questions, including the age and sex to establish the norms of the person's signals, after which the hard and serious questions follow.

The sensors sense any changes in the candidate's system, and variations in heart beat rate, blood pressure, and increased perspiration are relayed to a moving paper on the examiner's gadget.

In case of changes like a faster heartbeat and an increased blood pressure, the person is considered to be lying.

However, according to science.howstuffworks.com, the technology can be misleading as most people are likely to be tense during such sessions, resulting in changes in their systems even though they might be telling the truth.