L1 acquisition is rule-governed and not lists of memorized word pairs

It contains principles that are universal to all human languages.

Humans are programmed to develop certain kinds of knowledge and skills at specific times, and if they do not do so at that time period, they may never learn how.

This is the process of reducing connections that are too broad to more specific ones.

The use of two languages in the same utterance [intra-utterance mixing] or stretch of conversation [inter-utterance mixing].

Behaviorism, Innatism, Interactionism.

Because children are pre-equipped with UG, all they have to learn is the ways in which the language they are acquiring makes use of these principles.

Language learning occurs as a result of the myriad of interactions in which children engage with people and objects in their environment.

These are children who learn two languages from birth/earliest childhood.

Research shows that children do indeed code-mix following the patterns and rules of adults, giving clear evidence to the development of 2 separate grammars (sets of grammar rules) in the BLFA child

imitation and practice.

Its role is to uncover the underlying rules of the language system to which they are exposed

A supportive one.

These are persons who learn the L2 later in life.

BFL babies can distinguish sounds and babble at about the same time as monolingual babies.

These examples show that children look for patterns and generalize them to new contexts, discrediting Behaviorism.

Children do not only produce sentences that mimic the ones they hear in the environment; they produce novel utterances using words and grammar structures they’ve heard in the input.

This theory suggests that children form links or connections between words and phrases and situations in which they occur.

Additive bilingualism is better than subtractive bilingualism because in additive bilingualism there is maintenance of the home/family language while the other language is also being acquired, causing positive consequences such as maintenance of the home

Perception of sounds and word learning.

Language learning is innate and that the same universal principles underlie all languages

As the child is exposed to the input, the LAD sets the parameters for that language.

According to some researchers, child-directed speech is one way to offer babies a supportive language environment.

BFL learners acquire linguistic properties at about the same rate as monolingual learners.

Production of first words, rate of vocabulary acquisition, distribution of words is at about the same as monolinguals.