Test Description: (SIH) is a measurement of autonomic hyperactivity
induced by anxiety-provoking stimuli. The method involves taking two rectal
body temperature measurements 10 minutes apart. SIH is determined by subtracting
the basal body temperature (T1) from the stress-enhanced temperature (T2). The
difference in delta values (T2 - T1 = deltaT) indicates the severity of autonomic
hyperactivity or SIH. The rise in body temperature associated with SIH is a sign
of anticipatory anxiety to the second rectal body temperature measurement. Lower
deltaT values suggest decreased anxiety-like responses.