Parents are finding some benefits to teaching sign language to their infants. There is no consensus that early signing can bring improvement in IQ scores, as some advocates suggest. But almost everyone says that the positive parent-child interaction involved in teaching and using sign language is beneficial. "What you are really doing is interacting with your child," said Kathy Hirsh-Pasek, a professor of psychology at Temple. "The more you interact with your children, the better their language skills are going to be, so whatever gets parents to do that, it is a positive thing."