in a pre job test, i have admitted to prior usage of grass. could "have you ever seen any one smoke grass" be a control?
second, i just read the papers on the Prof. fruedy's page.
it says that the actual time you are hooked up to the poly (in normal) cases is 30 mins. is this true?
last, this Prof. freudy, how reliable is his work?
Professor Furedy (http://www.psych.utoronto.ca/~furedy/) (note spelling) is correct about the amount of time one typically spends actually attached to the polygraph instrument. Although the entire process (pre-test, in-test, post-test phases) may run for several hours, the "in-test" phase is typically 30 minutes or less.