Please watch the videos below and answer the questions after.
Equipment we use in the class: http://www.youtube.com/watch?v=65TLKM-lT-k
(Unfortunately, we cannot run the lab activity in class. This video will give you a brief idea about the polygraph we use for a class demonstration)
Video Part 1: http://www.youtube.com/watch?v=GLL3wtgBiFA
Video Part 2: http://www.youtube.com/watch?v=tJXMrJJMNZ4