The earliest stage of speech development is called the ________ stage.

Which of the following is an example of over-regularizing in language development?

a. "Ba-ba" (for bottle) b. "Super-mega-huge" c. "Comed" d. "Kitty" (for skunk)

Butler and colleagues (2006 ) argue that meta-analyses can be made more meaningful and informative if the results take into account:

a) Directionality problems b) Confounding variables c) Moderator variables d) Mediator variables