Expression used in the practice of PDD to characterize recorded physiological patterns that suggest the examinee’s basal level of arousal is high. This arousal is not indicative of deception in itself. GNT is sometimes indicated by very fast heart rates, unusually labile electrodermal activity, and uneven breathing cycles. PDD examiners try to bring examinee’s arousal state to a median level to optimize the interpretability of the test charts.
