This might be what is being recommended; the spelling of Bayley is different - it might be why you couldn't find much on it.

http://www.answers.com/topic/bayley-scales-of-infant-development

Did the doc give you any reasons/clues as to their thinking in making this recommendation? Did they give you some psychologists to call about it? Definitely give them a ring to discuss if so. I think a lot of people on this forum would be curious to find out more about this assessment.