Fear A rational reaction to an objectively identified external danger that may induce a person to flee or attack in self-defense.
Fight-or-flight response A sequence of internal activities triggered when an organism is faced with a threat; prepares the body for combat and struggle or for running away to safety; recent evidence suggests that the response is characteristic only of males.
Five-factor model A comprehensive descriptive personality system that maps out the relationships among common traits, theoretical concepts, and personality scales; informally called the Big Five.
Fixation A state in which a person remains attached to objects or activities more appropriate for an earlier stage of psychosexual development.
Free association The therapeutic method in which a patient gives a running account of thoughts, wishes, physical sensations, and mental images as they occur.
Frequency distribution A summary of how frequently each score appears in a set of observations.
Frequency theory The theory that a tone produces a rate of vibration in the basilar membrane equal to its frequency, with the result that pitch can be coded by the frequency of the neural response.
Frustration-aggression hypothesis According to this hypothesis, frustration occurs in situations in which people are prevented or blocked from attaining their goals; a rise in frustration then leads to a greater probability of aggression.
Functionalism The perspective on mind and behavior that focuses on the examination of their functions in an organism's interactions with the environment.
