Time line of SLA Theories (Content taken from http://www.sil.org/sites/default/files/files/theories_and_research_of_second_language_acquisition.pdf)

AuiolingualDirec Method

Period: Mar 7, 1900 to Mar 7, 1939

Early 1900s
(Bloomfield, Fries)

Behaviorist, S-R-R

Period: Mar 7, 1940 to Mar 7, 1959

Skinner

Universal Grammar, LAD

Period: Mar 7, 1960 to Mar 7, 1979

Chomsky, Krashen

Inormation Processing models

Period: Mar 7, 1980 to Mar 7, 1999

Anderson, McLauhlin

Social Interacionism

Period: Mar 7, 1990 to Mar 7, 2016

Vyostsky, Snow