Anjum P. Saleemi argues that the acquisition of language as a cognitive
system can properly be understood by pairing the formal approach to
learning, often known as learnability theory, with Chomsky's theory of
Universal Grammar and its claim that human language is innately
constrained, with some predefined space for variation. Focusing on
specific areas of syntax, such as binding theory and the null subject
parameter, Dr Saleemi unites learnability theory's methodology with
Chomsky's principles-and-parameters model, and construes acquisition as
a function of linguistic principles with largely domain-specific
learning procedures, mediated by environmental input. The aim of this
study is to show that a self-contained linguistic theory cannot by
itself be psychologically plausible, but depends on a compatible theory
of learning which embraces developmental as well as formal issues.