| A | B |
| formal operational thought | In Piaget's theory, the forth stage of cognitive development; arises from combination of maturation and experience |
| hypothetical thought | thought that involves propositions and possibilities that may or may not reflect reality |
| inductive reasoning | reasoning from one or more specific experiences or facts to a general conclusion |
| deductive reasoning | reasoning from a general statement or principle, through logical steps, to a specific conclusion |
| adolescent egocentrism | a self view in which adolescents regard themselves as much more socially significant than they actually are |
| invincibility fable | the fiction, fostered by adolescent egocentrism, that one is immune to common dangers |
| personal fable | egocentric idea, held by many adolescents, that one is destined for fame and fortune |
| imaginary audience | egocentric idea, held by many adolescents, that others are intensely interested in them |
| person- environment fit | degree in which a environment is conducive to the growth of a particular individual |
| volatile mismatch | forms between adolescents and their schools |
| sexually transmitted disease (STD) | disease spread by sexual contact |