The basics of behaviorism and its founder John B. Watson

Wilhelm Wundt's place in the history of psychology

While ancient philosophers considered the central problems of psychology, it was Wilhelm Wundt who first called himself one. Here's a quick video overview of his contribution.

Wilhelm Wundt, the forgotten father of modern psychology

He was the first psychologist to call himself one, and he influenced a whole generation of early psychologists. Learn about the life and works of Wilhelm Wundt with this thorough entry from a philosophy encyclopedia.

How we learn: comparing classical and operant conditioning

Psychology helps us see how we learn, whether through positive reinforcement or by conditioning a response to a stimulus. Learn about these two key theories in this brief video.

Who was Freud and what did he say?

Sigmund Freud is one of the most famous psychologists and is widely cited—but do you really know the basics of what he taught? Here's a super brief breakdown of his major insights.

William James laid the foundation for psychology as a scientific discipline in the US

Though initially trained in painting, James would help establish Harvard's psychology department as a distinct science rather than an extension of philosophy. He taught one of the first psychology courses in America and is credited as one of the founders of American Pragmatism.

What is psychology? An overview

What is psychology and why should we study it? This short video from Macat explains how the subject has developed over the years and introduces some of the key thinkers and ideas.

'Mr. Watson, come here. I want to see you.'

- Alexander Graham Bell's first words transmitted via telephone (March 10, 1876)

'There cannot be mental atrophy in any person who continues to observe, to remember what he observes, and to seek answers for his unceasing hows and whys about things.'

-Alexander Graham Bell (1847-1922)

A brief history of artificial intelligence

The concept of artificial intelligence and what it may mean for humanity has evolved as computer technologies have grown increasingly powerful through the decades. Beginning with the first (massive) computers in the 1940s, scientists have sought to make the machines as intelligent as humans. But it wasn't until computing power made exponential gains have computers begun to imitate human behavior.

The history of brainwashing in America

"Brainwashing" refers to a coerced shift in worldview, often associated with cults or oppressive totalitarian governments. Though such processes are not well understood on a neurological level, they hold an outsized role in public imagination, particularly in science fiction and dystopias. This article reviews the history of the term, first popularized by Edward Hunter in 1950, and the subsequent use of the approach in pop psychology, the CIA, and more.

Watson and Crick revealed DNA's double-helix structure using others' key findings

Their 1953 model, made from cardboard cutouts, explained how DNA stores genetic information through base pairing. Rather than experimenting and collecting their own data, they incorporated patterns and data from other scientists through trial and error.

Anthropic's staff philosopher discusses the importance of teaching ethics to AI

Amanda Askell's work focuses on the behavior and values reflected in Claude, the company's AI chatbot, and how its character can better align with how the "ideal person" would act in Claude's position. She also emphasizes the importance of humans being ethical in their interactions with current models, from which future ones will be built.

Charles Darwin studied goose bumps by scaring zoo animals in London with a stuffed snake

Read the famous naturalist’s work from the late 1800s, detailing how he sought to draw comparisons between how animals and humans respond to fear. As part of that work, he exposed monkeys and a peccary to a stuffed snake and noted the animals’ hair-raising fear response.

Browse and explore dozens of major psychology theories

There are a ton of different psych theories—so here's a breakdown of some of the major ones according to the general psychological focus.

An overview on germ theory, the crucial framework developed by Louis Pasteur

Germ theory of disease is based on the concept that many diseases are caused by infections with microorganisms, typically only visualized under high magnification. Read this general overview to understand the basic framework which allowed for development of vaccines.

Some founders of quantum mechanics thought consciousness could influence phenomena

Since quantum systems exist as a superposition of states before producing a definitive outcome, some quantum pioneers wondered if the act of conscious observation was what collapsed the wave function of possibilities into one state.

Explore (digitally) the Computer History Museum

When IBM’s Deep Blue supercomputer won its famous chess rematch with then world champion Garry Kasparov in May 1997, the victory was hailed far and wide as a triumph of artificial intelligence. But John McCarthy—the man who coined the term and pioneered the field of AI research—didn’t see it that way. An obituary about McCarthy—who passed in 2001—and his ideas.

Scientists William Russell and Rex Burch proposed in 1959 that when it comes to animal testing, there should be 'three Rs'—replace animals wherever possible; reduce their numbers; refine how they're treated.

Watch a Yale University psychologist explain his new supportive parenting anxiety therapy.

Computational and biological systems share fundamental principles, like randomness

Proposed by Alan Turing and John von Neumann, the concept originates from how DNA and computers run by executing encoded instructions in parallel. The advent of AI and the temperature parameter has seen neural networks mimic the randomness of protein encoding.

Early 20th-century debates about horses with 'paranormal mathematical abilities' helped shape modern approaches to psychological research.

CBT helps rewire the brain's false beliefs by challenging negative thoughts

Cognitive behavioral therapy identifies how specific situations can trigger distorted core beliefs—often formed early in life—that negatively shape thoughts and behavior. It frequently uses structured questioning that promotes self-reflection to uncover distorted thinking and guide people toward more balanced perspectives.

Edward Jenner, the father of vaccinations

The British physician was the first to attempt to inoculate someone from smallpox using its milder cousin, cowpox. His innovations and documentations would prove crucial to the deployment of widespread vaccinations.

Existentialism has been used as a therapeutic tool, with 2 Swiss psychiatrists pioneering the philosophy's concepts to help patients navigate their issues.

Watson's book was described as misleading when detailing Franklin's role in DNA

Despite working together to win the Nobel Prize for their discovery of the structure of DNA, Francis Crick and Maurice Wilkins objected to the publication of James Watson's account of DNA's discovery. Those involved describe how he villainized Rosalind Franklin and downplayed her work.

Many private schools follow Dewey's experiential learning model

John Dewey is perhaps the biggest figure in American education. He is known for emphasizing active, experiential learning and founding one of the country’s most renowned private schools: the Experimental School, which would later become the Laboratory Schools in Chicago.

The world's first chatbot, ELIZA, was developed in the 1960s as a technical demonstration exploring human-computer communication, with one of its scripts allowing it to emulate a psychotherapist.

Baby monkeys chose a soft, warm doll over a wire one with food

Harry Harlow performed controversial experiments with newborn monkeys, separating them from their mothers and letting them bond with stand-in mother figures made from either wire or figures covered in cloth—both with monkey-like faces. The work investigated touch, bonding, and attachment, and found that monkeys overwhelmingly preferred the cloth dolls over the wire ones in various stressful situations.

Six of history's most unethical human experiments, from deliberate flu exposure to withholding syphilis treatment

Some of the progress made in mental health treatment, vaccines, blood transfusions, and more came about before the advent of consent and ethics committees, resulting in serious physical and psychological harm that participants in studies were not even anticipating.

Walter Camp revolutionized American Football

When Walter Camp was introduced to the game of football in the late 1800s, the rules weren’t set, the field wasn’t uniform, and the game was brutal. Camp joined early rules committees and was instrumental in shaping the modern game. Read this deep dive into Camp’s early life and influences, and find out how he established the line of scrimmage and the series of downs.

Listen to audio clips from Hoover, a harbor seal named after its insatiable appetite, who learned to say English phrases such as 'hello there' and 'come over here.'

Meet Clever Hans, the 1900s horse that was believed to be able to solve math equations and read German

When Clever Hans was prompted with math questions, he responded by tapping his hoof to indicate his answers. Even a panel of experts found no indication of trickery in the horse's demonstrations. However, psychology student Oskar Pfungst found that Hans stopped tapping once a subtle cue on his owner's face told him to stop. The cues were so subtle that Wilhelm von Osten didn't even know he was giving them.

A full crash course in psychology

This 40-episode crash course series mirrors the curriculum of an advanced high school class on the psychology with well-known creators the Green brothers. Browse each roughly 10-minute episode or watch them all.

In the 1950s, Alan Turing developed a mathematical model to explain why animals have stripes, spots, and other patterns based on differences in how quickly two interacting chemicals spread throughout a developing organism.

Anthropic's interpretability team discusses how AI models' thinking mimics biology

Just as humans engage in complex behaviors to survive and reproduce, teams of experts in neuroscience, virology, mathematics, and other disciplines argue that large language models develop complex mechanisms to achieve their goals. These mechanisms can be manipulated to assess how they modify outputs—much like stimulating individual neurons—to uncover how LLMs "think."

The work of Claude Shannon, for whom Anthropic's AI chatbot is named

Known as the father of information theory, Claude Shannon applied Boolean algebra—a subset of mathematics that quantifies true or false statements as 1 or 0, respectively—to circuit design to develop the concept of a binary digit. His paper "A Mathematical Theory of Communication" (1948) laid the groundwork for all modern digital systems.

Wilbur published key papers, gave speeches in the burgeoning aviation community

Much of the theoretical work is credited to Wilbur, whose scientific mind observed birds and early pioneers to discover the key problem to solve was control. This 1901 speech surveys the recent work in the field and showcases what the brothers worked on two years before their breakthrough flight.

In the early 20th century, 'baby cages' were popular among parents who believed that putting their children in the cold would build their immunity to minor illnesses.

Early MBA curricula were influenced by a movement in ‘scientific management’

The Scientific Management movement was pioneered by Frederick Winslow Taylor in the early 1900s and posited managers should take a scientific approach to work, studying each task and system in the workplace from an objective lens. It’s still considered the backbone of modern management practices.

Hawking suggested studying black holes could reveal truths about the universe's start

After predicting black holes could evaporate and before undergoing a tracheotomy, Stephen Hawking conducted interviews in his voice, explaining phenomena like black holes and the Big Bang. In this clip, he explains how curiosity drives humans to become “masters of the universe.”

Walter Camp shaped the rules that transformed football into the modern game

Known as the “Father of American Football,” Walter Camp introduced key innovations in the 1880s—such as the line of scrimmage, the system of downs, and the snap—that distinguished football from rugby and defined its modern structure.

Studies suggest only 9% of a dog's personality comes from its breed

While all dogs descend from wolves domesticated and bred for specific tasks by humans at least 15,000 years ago, most behavioral characteristics result from a mix of genetics and environment, which result in diverse canine dispositions within the same breed.

'The Father of Positive Psychology' gives tips on building resilience

People differ in how they respond to setbacks. Famed psychologist Martin Seligman outlines three key pillars for resilience: developing mental toughness by interpreting failures as external and temporary, recognizing and using one’s signature strengths, and cultivating strong relationships that offer support and meaning.

Understanding college basketball's guru, UCLA's John Wooden

John Wooden coached UCLA to an unprecedented 10 NCAA titles, including seven straight from 1967 to 1973. He studied the characteristics that made people successful and, in 1948, created his iconic triangular diagram with 25 common behaviors. This article unpacks the 25-block framework that makes the "Pyramid of Success" and shows how Wooden's off-court wisdom shaped future champs like Bill Walton and Steve Kerr.

Bill Bowerman brought running for fitness to America

Nike cofounder Bill Bowerman once cowrote a book with a doctor, W.E. Harris, called “Jogging.” Published in 1967 by New York, Grosset & Dunlap, it introduced America to the idea of running for health, instead of just sport—and kicked off the fitness frenzy of the 1970s that fueled Nike’s early success. (Some readers may experience a paywall).

The simple grandeur of atomic theory

Is the universe made up of a continuous substance, or a finite amount of tiny, indivisible atoms? The atomic hypothesis, largely vindicated in the 20th century, was forgotten for nearly 2,000 years after first being formulated by the Greek philosopher Democritus. Learn more about the theory and its implications for science and human life with this reflective essay.

Robert Oppenheimer became the face of the Manhattan Project and the atomic bomb

This feature explores Oppenheimer’s early life, the traits that made him central to the development of the atomic bomb, and how his later years were marked by tension between pride in his work and opposition to weapons of mass destruction.

Discussing his early life, David Attenborough describes how his TV career began by chance

Growing up on the University College, Leicester campus, where his father was principal, Attenborough uncovered specimens such as coiled shells in the rocks and limestone of the surrounding Midlands, which sparked his interest in nature. A week after not landing an interview for a radio job he had applied for, Attenborough was offered a position on "a new thing called television."

Existentialism inspired Franklin Roosevelt and Martin Luther King Jr.

The Danish philosopher, sometimes called “the father of existentialism,” believed that individuals needed to resist the temptation of conformity and instead discover their authentic selves. His work became remarkably influential in the 20th century. In 1944, Roosevelt said that reading Kierkegaard made him understand how the Nazis could’ve enacted so much violence. In 1959, King wrote that existentialism was “especially meaningful for our time.”

Watch this behind-the-scenes interview about the first person ever diagnosed with autism

Two reporters from The Atlantic tell the story behind their effort to track down the first diagnosed autism patient, Donald Gray Triplett, in Forest, Mississippi, and how his life turned out decades later.