What Is Psychology?

Welcome to Psych 101

Have you ever wondered what psychology really is? By the end of this video, you will know what psychology actually is, where it came from, and how to start thinking like a psychologist today.

Welcome to Psych 101. I’m Desiree, your instructor for this series, and this is lesson one: What is psychology?

From Philosophy to Science

Let’s begin our journey with a brief history lesson and discover how psychology became a science.

Before psychology existed as a scientific discipline, humans were already asking the big questions: What is the mind? What makes us who we are? And how do we learn, think, and make choices?

That curiosity began with early Greek philosophers like Plato and Aristotle. But they weren’t doing experiments. They tried to understand human nature through observation and debate.

Fast forward to the Age of Enlightenment. A wave of new thinkers reshaped these old ideas into something more scientific.

Descartes argued that the mind and body are separate, which opened the door to studying the mind as something that could be examined.

David Hume argued that knowledge comes from experience and observation, not beliefs or intuition alone.

And Immanuel Kant suggested that the mind actively organizes our experiences, meaning we shape our understanding rather than passively receiving it.

These ideas slowly created a bridge from philosophy into something more measurable.

Wundt’s Psychology Laboratory

These Enlightenment ideas inspired physiologist Wilhelm Wundt, a scientist who believed that the same methods used to study the brain and nerves could be applied to the study of consciousness itself.

In 1879, Wundt opened the first psychology laboratory at the University of Leipzig in Germany. That moment is considered the birth of psychology as a scientific discipline.

This shift is what separated psychology from philosophy.

Defining Psychology

Now that you know where psychology came from, let’s define it in modern terms.

Psychology is the scientific study of mind and behavior.

Mind refers to our thoughts, emotions, memories, and internal experiences.

Behavior refers to anything we do that can be observed or measured.

Both matter because psychology studies how internal experiences translate into observable behavior.

The Four Goals of Psychology

Now let’s look at one of the most powerful tools in psychology. This is a framework that will help you start thinking like a psychologist instantly.

Here are the four goals of psychology:

Describe behavior. Ask what is happening. This is the basic observation step.

Explain behavior. Ask why it is happening. This is where we look for causes, motives, or influences.

Predict behavior. Ask when this behavior is likely to happen again. This helps psychologists anticipate patterns.

Influence or modify behavior. Ask how we can help someone change or improve. This is the applied side, including therapy, interventions, and support.

These four goals guide everything from research to therapy to everyday decision-making.

Seven Perspectives on Behavior

Now that you understand what psychologists do, let’s look at the different perspectives they use to understand human behavior.

Psychology isn’t just one theory or approach. It’s a toolkit for understanding people, and each perspective answers a different piece of the puzzle.

Here are the seven main lenses psychologists use to understand behavior. Don’t worry about memorizing these yet. In the next lesson, we’ll take a deeper look at each perspective and see how they actually shape your thoughts, behaviors, and daily life.

The biological perspective focuses on the brain, body, and genetics.

The cognitive perspective focuses on thoughts, problem-solving, and mental processes.

The behavioral perspective focuses on learning through reinforcement and the environment.

The humanistic perspective focuses on personal growth, meaning, and self-actualization.

The psychodynamic perspective explores unconscious motives and early experiences.

The sociocultural perspective focuses on culture, identity, and social environments.

And the evolutionary perspective examines universal behavioral patterns shaped by survival.

Brain Busters

Now, let’s put that brain of yours to work. It’s time for the Brain Busters game. Let’s see if you’ve been paying attention.

You did great. Let’s do a quick recap of the lesson.

Lesson Recap

Psychology began with philosophy. Wundt transformed it into a scientific discipline.

Psychology studies both the mind and behavior.

The four goals of psychology help us understand what psychologists do.

And there are multiple perspectives that we will continue exploring throughout this course.

Before You Go

Before you go, here’s your Homework Free Zone question for today: Tell me where you’re learning from. I love seeing how far this little psychology community reaches.

Great job finishing lesson one. In our next lesson, we’re diving into the seven major psychological perspectives and the different subfields in psychology.

Make sure you subscribe so you don’t miss it, and I’ll see you in the next lesson.