• Leslie –
Studied children's and established 3 main types:
1) Categorical = a word for a member of one category is extended to other members of the same category.
eg. using 'apple' to label all fruit
2) = a word for one object used for another object that bears a similar function of physical attribute.
eg. calling a hat a 'hairbrush' (as both are used on head)
3) /Mismatch Statements = a word used to make a statement in relation to another object.
eg. saying 'Dolly' upon seeing an empty doll's bed

Findings showed that the majority of a child's overextensions were .
- % mismatch statements
- 15%

Piaget -
Childrens' thoughts and communications are typically egocentric (i.e. about ).
Egocentrism = child's to see a situation from another person's point of view.

According to Piaget, the egocentric child assumes that other people see, hear, and feel exactly the as the child does.