Personality is affected by the development of abilities.
  The various approaches used to study personality today reflect the influence of the first theorists in the field, a group that includes Sigmund Freud, Alfred Adler, Gordon Allport, Hans Eysenck, Abraham Maslow, and Carl Rogers
 Intra- and intergroup processes, not dyadic relationships such as parent-child relationships, are responsible for the transmission of culture and for environmental modification of children's personality characteristics

