However, since previous studies have already shown that there is a certain point where children rise above the levels of chimpanzee language skills, these future studies need to focus on finding the particular average age in which this further development takes place. This means an ANOVA data analysis study based on a weekly transgression of language development of a relatively large population of growing kids and chimpanzees. With a larger portion being studies on a much more constant basis, researchers should be able to get a more concrete age range of when human children begin to significantly rise above the language skills of chimpanzees based on the complexity of utterances and sentences. This would provide the psychological world a better idea of exactly what age range we branch of from our ape ancestors.

(1990). A prospective study of the relationship between specific language impairment, phonological disorders, and reading retardation. Journal of Child Psychology and Psychiatry. Volume 31. Pp. 1027-1050.
Dwyer, David. (1986). What are chimpanzees telling us about language? Michigan

State University. July 16. 2008. http://209.85.141.104/search?q=cache:7F1wTmr84NkJ:www.msu.edu/~dwyer/WHAT%2520ARE%2520CHIMPANZEES%2520TELLING%2520US%2520ABOUT%2520LANGUAGE.doc+mean+length+of+utterance+chimpanzee&hl=en&ct=clnk&cd=4&gl=us&client=firefox-a

Gardner, R.A. & Gardner, B.T. (1969). Teaching sign language to a chimpanzee.

OCR. January 3. 2003. http://www.garysturt.free-online.co.uk/gardner.htm