Edward Thorndike
American psychologist who pioneered connectionism and the law of effect.
Edward Lee Thorndike was an American psychologist who spent nearly his entire career at Teachers College, Columbia University. His work on comparative psychology and the learning process led to his theory of connectionism and helped lay the scientific foundation for educational psychology. He also worked on solving industrial problems, such as employee exams and testing. A Review of General Psychology survey published in 2002 ranked Thorndike as the ninth-most cited psychologist of the 20th century.
- born
- August 31, 1874
- died
- August 9, 1949
- field
- Psychology
- nationality
- American
- known_for
- Theory of connectionism, law of effect, puzzle box experiments, contributions to educational psychology
Lore & Background
Thorndike, born in Williamsburg, Massachusetts, was the son of a Methodist minister. He graduated from The Roxbury Latin School in 1891 and from Wesleyan University in 1895, earned an M.A. at Harvard University in 1897, and completed his PhD at Columbia University in 1898 under James McKeen Cattell. While at Harvard, he worked with William James and became interested in how animals learn. After a year of unhappy initial employment at the College for Women of Case Western Reserve, he became an instructor in psychology at Teachers College at Columbia University in 1899, where he remained for the rest of his career. He married Elizabeth Moulton on August 29, 1900, and they had five children, including Frances, who became a mathematician. During the early stages of his career, he purchased a wide tract of land on the Hudson and encouraged other researchers to settle around him, forming a colony with him as its 'tribal' chief.
Reader's Guide
Thorndike's significance lies in his foundational contributions to behavioral psychology and education. His puzzle box experiments with cats demonstrated that learning occurs through trial and error, not insight, leading to his law of effect: behaviors followed by satisfying consequences are strengthened. This principle provided the basic framework for empirical laws in behavior psychology and greatly influenced reinforcement theory and classroom practices. He also identified three areas of intellectual development—abstract, mechanical, and social intelligence—and argued that the ability to learn did not decline until age 35, then only at 1 percent per year. During World War I, he helped develop the Army Beta test for illiterate and non-English speaking recruits. Thorndike served as president of the American Psychological Association in 1912 and as the second president of the Psychometric Society in 1937. His identical elements theory of transfer addressed how learning in one situation transfers to another. His work remains a cornerstone of educational psychology.
Did You Know?
- Thorndike's doctoral dissertation was the first in psychology where the subjects were nonhumans.
- He served as president of the American Psychological Association in 1912.
- He helped develop the Army Beta test during World War I to evaluate illiterate and non-English speaking recruits.
- A 2002 survey ranked Thorndike as the ninth-most cited psychologist of the 20th century.
Gallery
Frequently Asked Questions
Who is Edward Thorndike?
Edward Lee Thorndike (1874–1949) was an American psychologist who developed the theory of connectionism and the law of effect. He spent virtually his whole career at Teachers College, Columbia University, where he helped build the scientific foundation of educational psychology.
What is Edward Thorndike's law of effect?
The law of effect states that a response followed by a satisfying outcome becomes more likely to be repeated, while one followed by an unpleasant outcome weakens over time. Thorndike derived this principle from his animal learning experiments, and it became a foundational idea in behaviorist learning theory.
What were Thorndike's puzzle box experiments?
Thorndike confined cats and other animals in boxes that could be escaped by triggering a latch, then tracked how their trial-and-error behavior improved across repeated sessions. These experiments produced the data behind his connectionist model, which described learning as the gradual strengthening of stimulus-response links rather than a sudden flash of insight.
Why is Edward Thorndike considered important in psychology?
A 2002 Review of General Psychology survey ranked him the ninth-most cited psychologist of the twentieth century, underscoring his wide reach across learning theory, education, and applied testing. He also extended psychological methods into industry by designing employee examinations and workplace problem-solving tools.
How does Edward Thorndike's connectionism differ from other learning theories of his era?
Connectionism proposed that learning is a mechanical, incremental process of reinforcing specific stimulus-response bonds, rejecting the idea that organisms reason or gain sudden insight. This empirical, measurable framework contrasted sharply with the more philosophical, rationalist accounts of learning that were still common in early-twentieth-century psychology.
More in Psychologists And Psychiatrists 1-24
Elsewhere in the Psychologists And Psychiatrists universe
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record