What do you understand by psychological and philosophical bases of language acquisition explain?

The philosophical basis of Language Acquisition B.F. Skinner’s behaviorist theory of language was the widely accepted language acquisition theory for philosophical basis during the late 1950s and 1960s. He believed that language is acquired under reinforcement principles. He argued that children acquire language through reinforcement practices and they associate words with meaning. He stated three main principles which include the following:

1. “Behavior  that  is  positively  reinforced  will  reoccur;  intermittent  reinforcement  is particularly effective.”
2. “Information should be presented in small amounts so that responses can be reinforced (“shaping”)”.
3. “Reinforcements  will  generalize  across  similar  stimuli  (“stimulus  generalization”) producing secondary conditioning.”

In 1957, Chomsky introduced the concept of language acquisition device (LAD) which was used to account for the language acquisition competence of human beings. He believed that the acquisition of the first language is the function of the human brain or an innate structure. The introduction of UG or Universal Grammar is also credited to Chomsky. Philosophical bases of language acquisition Chomsky believed that humans are born with:

1. LAD, a set of language learning tools.
2. LAD is an abstract part of the human mind which enables humans to acquire and produce language. 

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