Using research evidence, critically discuss the notion that cognitive development is shaped by external social factors, as well as internal cognitive factors.

This is a 2000 word essay. I have attached the essay criteria. There must be a page of references and citations. And at the bottom of the essay it must be mentioned the amount of words used. I am currently in the first year of study, and we are studying foundations to psychology. We are studying the book Psychology by Comer. The writing style I need is UK. Not US.