Personality: a particular pattern of behavior and thinking that prevails across time and situations and differentiates one person from another. Goal of psychologists who study personality is to discover the causes of individual differences in behavior. Research on human personality requires 2 kinds of effort: identifying personality characteristics, determining the variables that produce and control them. Nominal fallacy is the false belief that causes of an event are explained simply by naming and identifying them. Psychologists of personality denote a set of personal characteristics that determine the different ways we act and react in a variety of situations. Personality types: different categories into which personality characteristics can be assigned based on factors such as development experiences or physical characteristics. Theorists conceive individual differences in personality as differences in degrees, not kind www. notesolution. com. Personality trait: enduring personal characteristic that reveals itself in a particular pattern of behavior in a variety of situations.