earticle

영어

For the past 6 years, repeated research was conducted to develop the NFS method which was to improve the current examination method to meet the needs in the domestic situations. This study analyzes validity and accuracy of the NFS method through carefully controlled experiments. Also, in order to compare the accuracy between the Utah technique - so far, it is the most popular technique used in domestic situationsand the newly developed NFS technique, same experimental conditions were applied. The lie group’s task was to do a virtual criminal act and then asked to lie about their virtual crime and the truth group’s task was to do a normal desk work. Once the participants were finished with their task, the polygraph examinations each employed the NFS technique and the Utah technique separately was administered. The NFS technique showed 90% sensitivity, 100% specificity with 94.4% accuracy among 18 people tested. 2 people out of 20 had to be dropped off due to indiscernibleness. And for the Utah technique, it showed 83.3% sensitivity, 100% specificity with 94.1% accuracy. Both techniques showed high levels of accuracy. Further implications and limitations regarding these techniques will be dealt on the discussion section.