noun. With regard to polygraph examinations, any attempt on the behalf of a person to refrain from being categorized as misleading or corrupt. Usually, people might employ physical methods to escalate stimulation to queries not correlated with the issue being brought to attention, or drugs to decrease their degree of physiological stimulation.
COUNTERMEASURE: “The inmate attempted several countermeasures, going as far as saying the lie detector test was rigged.”