Externality is associated positively with superior performances on achievement tests

Your bill at the grocery is $9.30. You give the cashier $10.30 expecting to get a dollar bill in change. Instead, the cashier seems puzzled, counts out 70 cents in change, and leaves your 30 cents lying on the counter. The cashier's behavior illustrate

a. attribution analysis c. functional fixedness b. mental set d. compensatory decision-making

Fast mapping denotes the phenomenon that

a. words are associated with objects so rapidly that children are not systematically evaluating all possible meanings of a word. b. children have identified concepts prior to language; words are used as symbols to denote these concepts. c. children are more likely to learn words consisting of sounds they have already mastered. d. children often understand words before they are able to produce them in their own speech.