1. An acquired predisposition, need, or specific state of tension within an individual which arouses, maintains, and directs behavior toward a goal.learned drive; 2. The reason attributed to or given by an individual for a behavioral act. Cf. instinct. [L. moveo, to move, to set in motion]
achievement m. an acquired, chronic need to succeed in the face of recognizable obstacles; its strength is usually diagnosed from recurring themes in stories told by the individual while taking a thematic apperception test or from other assessment instruments used by clinical psychologists.
mastery m. an acquired need to be assertive, to stand out in a crowd, to be dominant.
Browse Medical References: