________ refers to enjoyment, positive anticipation, and excitement in social interaction

When Ming, who is 18 months old, uses the word "kitty" to describe any small furry animal regardless of whether or not it is a cat is an example of ____

a. underapplication b. overextension c. underextension d. overregulation

In a school in a traditional culture, recess combines all children from each class outside at once. Given the research, which of the following is a likely playgroup for a five- to six-year-old on that playground?

a. girls and boys playing together b. children from different grades playing together. c. children from the same grade/ age playing together. d. children not playing