"Joe the blacksmith" was an analog of

In their research on concept recognition, Rips, Shoben, and Smith found

a. that retrieval time is not a useful means of measuring concept formation. b. that all people organize their conceptual scheme of the world hierarchically. c. the Collins and Quillian model of concept organization. d. that people's system for classifying concepts is not as simple as the Collins and Quillian model suggests. e. that the Collins and Quillan model was applicable to natural concepts but not to abstract concepts.

About ______of tobacco users who quit for two or more days show evidence of tobacco

withdrawal disorder. a. 25% b. 90% c. 50% d. 30%