Outline crystals theory
Children learn words though semantics that they use to link physical things to words.
What are crystals 11 semantic feilds
People
Actions
Body parts
Vehicles
Clothing
Animals
Household objects
Locations
Adjectives
What happens because children use semantics
They may use the wrong word to describe an object because they do not understand the meaning of that word yet
Overextension applying the wrong word to the objects in its semantics
Under extension. Applying a word in only some contexts
Mismatch. No logical explanation for the misunderstanding