I'd kill to know what the questions are, because I'll bet they're incredibly culturally biased. When one of my kids was very young they were in a study which required me to fill out a survey of their spoken vocabulary. The list was of 100 words, and one of them was "dish". Which, outside of that one nursery rhyme, is not a word I've ever ever used in my life. My one year old certainly didn't know it!