Jean Berko Gleason
Key Date: 1958
She believed that children find patterns in language, rather than simply imitating others.
She proved this with the Wug theory. This was where she made up a creature and tested childrens under and over extention.
She believed that any "normal" child adequately exposed to language within their environment would learn it perfectly.
Key Date: 1971
U-Shaped graph to test the theory of regression.
He believed children deduce syntax through interaction with parents. He argued that children require support and interaction in order to gain language.
His view also included that children find patterns in language, rather than imitating.
Key Date: 1968
Came up with the idea of the LAD. (Language Acquisition Device)
He believed allchildren possesses a LAD, and that children have an innate, genetic tendency to learn language.
He also believes in the existence of Universal Grammar - innate linguistic knowledge.
Key Date: 1967
He agreed with Chomsky to a degree, but also added the Critical Period Hypothesis.
This was where he believed there was a critical period for children to acquire language, otherwise after this it would become increasingly difficult.
He also believes that children have an innate, genetic tendency to learn language.
His theory is supported by: Genie, the child who wasn't spoken too. She had passed the CPH and therefore struggled to learn language.