Role of nature Endogenousfactors play the primary role.

Determine the direction of development; constitution; drives.

Role of nurture Exogenousfactors play a secondary role.

The occasion and intensity of experience ...

Cause of development Maturation: a sequence of genetically determined changes.
Continuous? Discontinuous: Stages are parallel to (and caused by) changes in biological structure. Recapitulation of racial evolution.
Individual differences The result of different experiences and opportunities. (Not of genetic differences.)
Names G. Stanley Hall (1844 - 1924)

Arnold Gesell (1880-1961)

Sigmund Freud (1856-1939)

Noam Chomsky (1939-)

Reactions Links with racial prejudice, 

with eugenics?

endogenous = growing from inside (endon = within)

exogenous = growing from outside (exo = without)