Behavioral psychology is all about actions you can see. Instead of trying to guess what’s happening inside someone’s mind, behaviorists focus on observable behaviors. They believe our actions are shaped by our interactions with the world around us. In short, we learn how to behave.

One of the simplest ways we learn is by connecting two things that happen together. This is called classical conditioning. The most famous example comes from a scientist named Ivan Pavlov and his dogs.

Pavlov noticed that his dogs would start to salivate whenever they saw food. This is a natural, unlearned reaction. The food is an unconditioned stimulus (something that causes an automatic response), and the salivating is an unconditioned response (the automatic reaction).

Pavlov then started ringing a bell right before he fed the dogs. At first, the bell meant nothing to them. It was a neutral stimulus. But after ringing the bell before every meal, the dogs started to connect the sound of the bell with getting food. Eventually, Pavlov could ring the bell without bringing any food, and the dogs would still salivate. The bell had become a conditioned stimulus, and the salivation was now a conditioned response.

This isn't just for dogs. If you ever feel your heart race when you hear a song that was playing during a scary movie, you've experienced classical conditioning.

Another way we learn is through the consequences of our actions. This is called operant conditioning. The idea is simple: behaviors that are followed by pleasant consequences are likely to be repeated, while behaviors followed by unpleasant consequences are not.

There are two main types of consequences: reinforcement and punishment.

Reinforcement always increases a behavior.

• Positive reinforcement adds something good. A child who gets an allowance for doing chores is more likely to do them again.
• Negative reinforcement removes something bad. The annoying beeping in your car stops when you buckle your seatbelt, so you learn to buckle up faster.

Punishment always decreases a behavior.

• Positive punishment adds something bad. Touching a hot stove hurts, so you quickly learn not to do it again.
• Negative punishment removes something good. A teenager who stays out past curfew might lose their phone privileges for a week.

We don't always need direct experience to learn. Sometimes, we learn just by watching other people. This is the core of social learning theory, developed by psychologist Albert Bandura.

Bandura showed that we learn by observing others' behavior and seeing what happens to them. If you see a friend get praised for sharing, you might be more likely to share. If you see a sibling get in trouble for sneaking a cookie, you'll probably think twice before doing it yourself. This process of observing and imitating others is called modeling.

Let's test what you've learned about the foundations of behavioral psychology.

These three pillars—classical conditioning, operant conditioning, and social learning—provide a powerful framework for understanding why we act the way we do.