Even more startling, Andy and Pat showed babies a silent video of a face saying either ahhh or eeee, and then they palyed the babies audiotapes of each vowel sound. five-month-olds could tell which face went with which sound. They looked at the face with the wide-open month when they heard the ahhh sound and at the face with pulled-back lips when they heard the eeee sound. Babies evidently have a primitive ability to lip-read, at least for simple vowels. (This was a provocative experiment---all those wide-open mouths and ahhh. Soon after they finished doing the study together.Andy and Pat got married)