Receptive categorization according to the Function, Feature, or Class of an object. Examples: Function: “What do you eat with?” Child hands you a spoon. Feature: “Which one is round?” Child touches the picture of a ball. Class: “Which one is a toy?” Child gives you the yoyo on the table.

behavior of a person responding to another person’s verbal behavior. Listener responses are acquired through experience and are often highly specified. Listener responses are often called “receptive language.”

A person who responds to verbal behavior