Why do people act the way they do? Psychologists have been pondering this question since ancient times. Much of the knowledge we have about the human mind today has come from psychology experiments conducted within the last century. From Asch’s Conformity Experiment to Zimbardo’s Stanford Prison Experiment, the psychologists in this list of 25 Intriguing Psychology Experiments have helped gather new information and provide insight into the otherwise chaotic trends in human thought and behavior.
Selective Attention Test
Do you think you’re pretty observant? There’s one way to find out. Click on the video link above. Did you get the correct answer? If you did, congratulations! But the more important question is: Did you notice the man in the gorilla suit? In Simons and Chabris’ famous awareness test, subjects were asked to count how many passes occurred between basketball players on the white team. In the middle of the test, a man in a gorilla suit walked onto the court and stood in the center before walking off-screen. The study found that the majority of the subjects didn’t notice the gorilla at all, proving that humans often overestimate their ability to effectively multi-task.
Violinist in the Metro Station
Do you take the time to stop and appreciate the beauty around you? According to an experiment conducted in 2007, chances are you don’t. World famous violinist Josh Bell posed as a street musician in a Washington D.C. metro station to see how many people would stop and listen. Despite the fact that he was playing a $3.5 million handcrafted violin and had just sold out a concert in Boston where ticket prices averaged $100 each, very few people stopped to appreciate his beautiful performance. He made a measly $32 that day.
A Volkswagen initiative called The Fun Theory is setting out to prove that people’s behavior can be changed for the better by making mundane activities fun. In a recent experiment, they set up musical piano steps on the staircase of a Stockholm, Sweden subway station to see if more people would be more willing to choose the healthier option and take the stairs instead of the escalator. That day, 66 percent more people took the stairs than usual, proving that fun is the best way to get people to change their ways.
The Milgram Experiment
Humans are trained to take direction from authority figures from very early in life. An experiment conducted in 1961 by Yale University psychologist Stanley Milgram measured this willingness to obey authority figures by instructing people to perform acts that conflicted with their morals. Participants were told to play the role of “teacher” and administer electric shocks to “the learner,” who was supposedly in a different room, every time they answered a question incorrectly. In reality, no one was actually being shocked. Instead, Milgram played recordings to make it sound like the learner was in a great deal of pain and wanted to end the experiment. Despite these protests, many participants continued the experiment when the authority figure urged them to, increasing the voltage after each wrong answer until some eventually administered what would be lethal electric shocks. Similar experiments conducted since the original have provided nearly identical results, indicating that people are willing to go against their consciences if they are being told to do so by authority figures.
The Marshmallow Test
Can deferred gratification be an indicator of future success? This is what Walter Mischel of Stanford University sought to determine in his 1972 Marshmallow Experiment. Children ages four to six were taken into a room where a marshmallow was placed on the table in front of them. Before leaving each of the children alone in the room, the examiner told them they would receive a second marshmallow if the first was still on the table after 15 minutes. The examiner recorded how long each child resisted eating the marshmallow and later noted whether it correlated with the child’s success in adulthood. A minority of the 600 children ate the marshmallow immediately and one-third deferred gratification long enough to receive the second marshmallow. In follow-up studies, Mischel found that those who deferred gratification were significantly more competent and received higher SAT scores than their peers, meaning that this characteristic likely remains with a person for life.
The Bystander Effect
In case of an emergency, most people would probably want to be in a busy area so they have a higher chance of receiving help. Contrary to popular belief, being surrounded by people doesn’t guarantee anything. A psychological phenomenon called the Bystander Effect states that people are more likely to help someone in distress if there are few or no other witnesses. If there are more people around, one usually thinks someone else will stop to help. Scientists call this the diffusion of responsibility. The Bystander Effect was recently tested out on a busy London street and it turns out perceived social status plays a role in whether a person will receive help, but most people still continue on their way without stopping.
The Asch Conformity Experiment
The Asch Experiment is another famous example of the temptation to conform during group situations. This series of experiments conducted in the 1950s placed one subject in a room full of actors. The person conducting the experiment held up an image with three numbered lines and asked each person in the room to identify the longest line. The actors purposely chose the incorrect line in order to determine whether the subject would answer honestly or simply go along with the group answer. The results once again showed that people tend to conform in group situations.
The Stanford Prison Experiment
Considered to be one of the most unethical psychological experiments of all time, the Stanford Prison experiment studied the psychological effects a prison setting could have on behavior. In 1971, a mock prison was constructed in the basement of the psychology building of Stanford University and 24 male students were randomly selected to play the role of either a prisoner or prison guard for two weeks. The students adapted to their roles a little too well, becoming aggressive to the point of inflicting psychological torture. Even psychology professor Philip Zimbardo, who acted as superintendent of the experiment, proved susceptible to its effects by allowing the abuse to continue. The study was called off after only six days due to its intensity, but it proved that situations could provoke certain behaviors, in spite of an individual’s natural tendencies.
The Bobo Doll Experiment
During the 1960s, much debate arose about how genetics, environmental factors, or social learning shaped children’s development. Albert Bandura conducted the Bobo Doll Experiment in 1961 to prove that human behavior stemmed from social imitation rather than inherited genetic factors. He set up three groups: one was exposed to adults showing aggressive behavior towards a Bobo doll, another was exposed to a passive adult playing with the Bobo doll, and the third formed a control group. The results showed that children exposed to the aggressive model were more likely to exhibit aggressive behavior towards the doll themselves, while the other groups showed little imitative aggressive behavior.
Does the name Pavlov ring a bell? If not, you’ve probably been living under a rock. This famous experiment made the concept of the conditioned reflex widespread. Pavlov examined the rate of salivation among dogs when presented with food. He noticed the dogs would salivate upon seeing their food, so he began ringing a bell every time the food was presented to the dogs. Over time, the dogs began to associate the ringing of the bell with food and would salivate upon hearing the bell, demonstrating that reflexes can be learned.
The Little Albert experiment is like the human equivalent of Pavlov’s dogs. Probably one of the most unethical psychological studies of all time, this experiment conducted in 1920 by John B. Watson and his partner Rosalie Rayner at Johns Hopkins University conditioned a nine-month-old boy to develop irrational fears. Watson began by placing a white rat in front of the infant, who showed no fear at first. He then produced a loud sound by striking a steel bar with a hammer every time little Albert touched the rat. After a while, the boy began to cry and exhibit signs of fear every time the rat appeared in the room. Watson also created similar conditioned reflexes with other common animals and objects until Albert feared them all, proving that classical conditioning works on humans.
Carlsberg Social Experiment
Carlsberg Social ExperimentIn this hilarious advertisement turned social experiment, unsuspecting couples walked into a 150-seat movie theater filled with 148 badass bikers and discovered that the only two empty seats were smack-dab in the middle. Some of the couples exited the theater to avoid having to shuffle past the bikers, but those who stayed were rewarded with Carlsberg beers and a whole lot of cheering. What would you do in that situation? Would you leave knowing your life would still be intact or trek your way to the middle of the theater and risk offending one of those intimidating guys? Just another reason why people shouldn’t judge based on appearances.
“Missing Child” Experiment
People often fail to notice their surroundings, an idea that was put to the test during a missing child experiment. A flier with information and a picture about a “missing child” was posted on the doors of a busy store. Some people stopped to study the flier while others merely glanced at it or didn’t look at all. What all of these people had in common that they were completely oblivious of the fact that the boy on the flier was standing right in front of the store. This experiment demonstrates that humans tend to overlook a lot of the things around them.
A Class Divided
Inspired by the assassination of Dr. Martin Luther King Jr., third grade teacher Jane Elliott created an exercise in 1968 to help her white students understand the effects of racism. Elliott divided her class into two groups: blue-eyed students and brown-eyed students. On the first day, she designated the blue-eyed children as the superior group and gave them extra privileges, while the brown-eyed children represented the minority group. She discouraged the two groups from interacting and singled out students to emphasize the negative aspects of those in the minority group. She noticed immediate changes in the behavior of the children. Blue-eyed students performed better academically and some began bullying their brown-eyed classmates, while brown-eyed students experienced lower self-confidence and worse academic performance. The next day, she reversed the roles of the two groups and the blue-eyed students became the minority group. At the end of the exercise, the children were so happy they embraced one another and agreed that people shouldn’t be judged based on outward appearances.
You can thank Harry Harlow for the amount of affection you received as a child. In a series of controversial experiments during the 1960s, he revealed the importance of a mother’s love for healthy childhood development. Harlow separated rhesus monkeys from their mothers a few hours after birth and left them to be “raised” by two surrogate mothers. One mother was made of wire with an attached bottle for food; the other was made of soft terrycloth but lacked food. Interestingly, the baby monkeys spent much more time with the cloth mother than the wire mother, thus proving that affection plays a greater role than sustenance when it comes to childhood development.
Mary is a journalism student at the University of Florida. She loves vintage fashion, The Rat Pack, superheroes, and all things Disney. Someday, she hopes to dazzle the world with her writing skills by becoming the next J.K. Rowling.