Mary Ainsworth

Mary Ainsworth
Born
Mary Dinsmore Salter

(1913-12-01)December 1, 1913
DiedMarch 21, 1999(1999-03-21) (aged 85)
Alma materUniversity of Toronto
Known forStrange situation
Spouse
Leonard Ainsworth
(m. 1950; div. 1960)
Scientific career
FieldsPsychoanalysis
Doctoral advisorWilliam E. Blatz

Mary Dinsmore Ainsworth (née Salter; December 1, 1913 – March 21, 1999) was an American-Canadian developmental psychologist known for her work in the development of the attachment theory. She designed the strange situation procedure to observe early emotional attachment between a child and their primary caregiver.

A 2002 Review of General Psychology survey ranked Ainsworth as the 97th most cited psychologist of the 20th century. Many of Ainsworth's studies are "cornerstones" of modern-day attachment theory.