More Than Sadness


Chapter 15: Psychological Disorders

Learning Outcomes

  • Describe the symptoms and diagnostic criteria for major depressive disorder in adolescents
  • Evaluate the importance of early recognition and intervention in adolescent mental health
  • Apply psychological reasoning to real-world situations involving mood disorders

Key Terms

major depressive disorder
commonly referred to as depression or major depression, characterized by sadness or loss of pleasure in usual activities, as well as other symptoms
rumination
in depression, tendency to repetitively and passively dwell on one's depressed symptoms, their meanings, and their consequences

The Silence Behind the Smile

Levi, a 15-year-old high school sophomore, was known for his bright smile and artistic talent. He designed posters for school events, played guitar in a band, and always had a joke ready for his friends. But over the past few months, something changed.

He stopped turning in assignments. His guitar sat untouched in the corner of his room. He withdrew from group chats and skipped lunch with friends. "I'm just tired," he told his mom. "School's been a lot."

A student with his head laying on the desk

At first, his parents thought it was typical teenage stress. But when Levi began sleeping excessively, avoiding eye contact, and expressing hopelessness, they reached out to a school counselor.

After a clinical interview and screening, Levi was diagnosed with major depressive disorder. The counselor explained that adolescent depression can look different from adult depression. It may involve irritability, social withdrawal, and changes in sleep or appetite.

Levi began therapy focused on cognitive restructuring and emotional regulation. He learned to identify his negative thought patterns, like "I ruin everything," and challenge them with more balanced perspectives.

He also joined a teen support group, where he met others navigating similar struggles. "I thought I was the only one who felt this way," he said. "It helps to talk to people who get it."

Over time, Levi began to re-engage with his passions. He picked up his guitar again and started sketching in his journal. Healing wasn't linear, but with support and understanding, Levi found his way forward.

A teen drawing in a journal

1. On Your Own

Which statement describes major depressive disorder in adolescents? Select the best answer.

What Does Depression Look Like?

Many teens experiencing depression do not seek help until symptoms become severe. Common signs include:

  • persistent sadness or irritability
  • withdrawal from friends and activities
  • changes in sleep, appetite, or energy
  • feelings of worthlessness or guilt

Rumination can play a role in worsening depressive symptoms. Adolescents who repeatedly dwell on negative thoughts are more likely to experience prolonged episodes. Protective factors—like supportive relationships, access to therapy, and coping skills—can reduce risk and improve outcomes.

2. On Your Own

Determine whether the following statement is true or false.

Adolescents with major depressive disorder often experience less sadness and withdrawal from daily life.

Levi's Progress

In therapy, Levi practiced mindfulness and journaling. He learned to notice when he was spiraling into negative thoughts and use grounding techniques to stay present.

One journal entry read: "I feel like I'm invisible." His therapist helped him reframe it: "I'm struggling, but I'm not alone. People care about me."

A group of teens sitting outside on a sunny day

Levi still had difficult days, but he felt more equipped to handle them. He began advocating for mental health awareness at school, helping organize a wellness week and sharing his story in a student-led podcast.

His mom reflected, "At first, we thought it was just typical teenage moodiness. I wish we'd known sooner. But I'm proud of how far he's come."

3. On Your Own

What are common symptoms of adolescent depression? Select the three that apply.

Explore the Concept

This video reviews common warning signs of depression in teens and why depression can manifest differently in this age group.

Reflect & Respond

Answer the following questions to reflect on key ideas from the case study. Remember to print your work before leaving this page!

  1. How can parents and peers recognize the signs of depression in adolescents?
  2. What are the risks of dismissing depressive symptoms as "just teenage moodiness"?
  3. How does early intervention impact recovery in adolescent mental health?
  4. What strategies can schools use to support students experiencing depression?

References

Psych2Go. (2021, September 12). 10 warning signs of depression in teenagers [Video]. YouTube. https://youtu.be/5q7BwQeOZsU?si=oksQwzfUSFGtA998

Sun, L., Zhang, Y., Xie, H., Li, Q., & Zhu, Z. (2025). The effect of depression on occupational efficacy of higher vocational college students: The mediating role of psychological resilience and social support. Frontiers in Psychiatry, 16, Article 1470204. https://doi.org/10.3389/fpsyt.2025.1470204
This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0).

Photo Credits

arrowsmith2 on Adobe Stock. "Tired uniform students sleeping in a exam test in classroom with stress."

Olga on Adobe Stock. "Table with elements for scrapbooking handcraft."

JackF on Adobe Stock. "teens spending time together in sunny day."