Wireless signals can detect your feelings with new device

What if your computer or smartphone could tell if you're happy or sad?

A new device developed by researchers at the Massachusetts Institute of Technology aims to detect emotions by sending wireless signals that measure heartbeats as the signals bounce off a person's body.

Researchers from MIT's Computer Science and Artificial Intelligence Laboratory say their device is 87 percent accurate in using heartrate and what it's already learned about a person to recognize joy, pleasure, sadness or anger, after the device first measures how each individual's body reacts in various emotional states.