Article ID: 1501br
The correlations between thoracic and abdominal respiratory responses and the effects of these types of breathing on the inhibitory breathing were investigated during 112 concealed information tests (CITs) conducted in the field. The guilty knowledge of all CIT examinees was confirmed by subsequent investigations. Respiratory amplitude (RA), rate (RR), and speed (RS) of thoracic and abdominal respiration were measured every second for 20 seconds following the stimulus onset. The results indicated mostly high positive correlations (r > .7) between thoracic and abdominal RA, RR, and RS. Additionally, thoracic inhibitory breathing had a more significant effect on RA and RS, as well as a significantly longer effect on RA and RR than abdominal breathing. These results suggest the validity of using single channel CIT measurement, and indicate the superiority of thorax respiration measurements in the CIT.
