Base-rate fallacy refers to the failure to consider the likelihood that a person, place or thing is a member of a particular category - some categories are simply larger than others.
Baseline observations is a term used in a single-subject research study that refer to series of observations or measurements made while no treatment is being administered.
Basic anxiety refers to a primary form of anxiety that arises from living in a hostile world.; a pervasive feeling of loneliness and helplessness said to be the foundation of neurosis . According to Horney, it is the feeling of being alone and helpless in a hostile world that a child experiences when he or she represses basic hostility . (See also Basic hostility.)