key terms

• overextension 


  applying a label to more references than it should have. a child saying a bath is the sea
• underextension 


  applying a label to fewer references than it should have. child saying that his cup is milk but the big bottle is a drink
• object permanece - 


  the ability to understand that an object still exists even through its not in sight
• virtuous errors 


  a logical mistake made by children based on the rules they already know
• discourse

  use of peek-a-boo as a way to learn turn-taking. other games focus on turn taking.
• IRF


  initiation, response and feedback structure, often used in classrooms (Sinclair and Coulthard) evident in early conversation