text: Let's say that students are in a class to learn about psychology or somethig of the sort. It would be very useful to find out what a person is feeling down to the percent. This device would also be helpful there because it tells you about the muscles that move to show a certain emotion. 'For example, your frontalis pars lateralis muscle (above your eyes) raises your eyebrows when surprised...' (D'Alto paragraph 3); students can study their muscles that make their emotions by learning about these muscles.