text: how can i construct a lie detector test for a science project by recording their heart rate, skin, etc.? i can detect lying by testing the changes in heart rate, skin texture(sweaty), physical appearances & reactions, and blood pressure.how would i go about all of this and what type of strategy should i use to stay in school requirements. i remember the radio shack lie detector kit from when i was a kid (that was back in the 1970's)