"Psychology is the science of the intellects, characters and behavior of animals including man"
About this Quote
The intent is disciplinary, almost political. In Thorndike’s era, psychology was still negotiating its identity against introspection-heavy traditions and moralistic theories of “character.” He keeps the old vocabulary (“intellects,” “characters”) but yokes it to “science,” implying that even the messiest parts of personhood can be studied with the same rigor as anything in biology. The subtext is methodological: if humans are animals, then controlled experiments, comparative studies, and observable outcomes aren’t crude substitutes for understanding; they are the route to it.
This is also the early 20th-century American confidence project in miniature: take what sounds like ineffable inner life and make it legible, predictable, and useful. Thorndike’s work in learning theory and educational measurement sits behind the sentence like a blueprint. If behavior and intellect are continuous across species, then learning can be engineered, standardized, optimized. That promise is the power of the quote, and also its quiet warning: once “character” becomes data, it becomes something institutions will try to manage.
Quote Details
| Topic | Science |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Thorndike, Edward. (2026, January 16). Psychology is the science of the intellects, characters and behavior of animals including man. FixQuotes. https://fixquotes.com/quotes/psychology-is-the-science-of-the-intellects-132421/
Chicago Style
Thorndike, Edward. "Psychology is the science of the intellects, characters and behavior of animals including man." FixQuotes. January 16, 2026. https://fixquotes.com/quotes/psychology-is-the-science-of-the-intellects-132421/.
MLA Style (9th ed.)
"Psychology is the science of the intellects, characters and behavior of animals including man." FixQuotes, 16 Jan. 2026, https://fixquotes.com/quotes/psychology-is-the-science-of-the-intellects-132421/. Accessed 12 Feb. 2026.




