Home›Developmental Psychology›Era (Birth Year)›By Decade›1900sBrowse By1900s1900sComments (0)Reader Challenges (0)1900sFilter Results3 entriesBranch of PsychologyAllComparative Psychology (1)Developmental Psychology (3)Nationality / CultureAllGermany (1)United Kingdom (1)United States (2)Principal TheoryAllAttachment Theory (1)Erikson's Stages of Psychosocial Development (1)Show ResultsBrowseCompareSelect all 3Erik Erikson1900sHarry Harlow1900sJohn Bowlby1900sComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.