(Porter, Woodworth & Birt, 2000) However after the training there was a significant increase in all groups. Proctoring officers increased their accuracy in detecting deception to 76%, students with feedback and training increased to 70%, students with feedback only increased to 65%, and the control group increased to 62%. (Porter & Woodworth & Birt, 2000) This work implies that it is indeed possible to increase an individual's ability above chance when significant training is involved. Porter et al., (2000) hypothesize that the control group was able to increase the detection rate due to the fact that they were critically observing or possibly pursuing searches outside the environment