Chapter 3

Question: How is it possible to actually know whether a nine month old is mentally rearranging objects or estimating the correct number in a small group?

I was intrigued, but puzzled when I read this. It seems impossible to track the children's thought, especially given their lack of communication development. I understand Tomasello's theory regarding the chapter, and the cognitive changes that occur at nine months of age are truly amazing. I am simply skeptical of the accuracy and the ability of these studies to accurately measure the results.