Well it's also that you adjust your "magnitude" of a reading based on the extremeness of the expression. So if you see someone smiling at a toy you think it's a

Well it's also that you adjust your "magnitude" of a reading based on the extremeness of the expression. So if you see someone smiling at a toy you think it's a fun toy but if you see someone MANIACALLY CACKLING at a toy you think MAN THAT TOY IS AMAZING I WANNA SEE IT.