From the article: Even the telltale spike in the polygraph chart, itself largely a myth created by TV and movies, can indicate anything from a heart problem to

From the article: Even the telltale spike in the polygraph chart, itself largely a myth created by TV and movies, can indicate anything from a heart problem to sexual attraction. (Indeed, the machine’s inventors used it to detect both of those things. Larson married one of his first test subjects, and Keeler discovered a heart defect while testing the machine on himself.)