What are the two levels of language developmental and when does each usually occur?
The two levels of language development are receptive language and expressive language.
Receptive language refers to the ability to understand and comprehend language. It involves understanding words, phrases, and sentences, as well as following instructions and responding to questions. Receptive language development typically begins in infancy and continues to progress throughout childhood.
Expressive language, on the other hand, refers to the ability to use language to express thoughts, ideas, and needs. It involves producing words, sentences, and phrases, as well as using grammar and vocabulary appropriately. Expressive language development typically starts around the age of 12 months with the emergence of single words, and it continues to develop and expand as children grow older.