[Harvey]

There's a lot of information on the topic. I'm planning on starting a blog again shortly. Take a look at this image.



Some of these facial expressions are obvious. Example: sadness/happiness/etc. But those aren't the most useful ones. You want to learn pity. You want to learn contempt. Disgust and desire.



You need to pay attention to the eyes. When someone is lying, they'll typically look upward and to the right. There's a whole science about it. So many different things to study.