Erikson, Piaget & Psychology Theories & Concepts Explained

Identity Crisis Symptoms: Why Exploration Peaks at 19

In the mid-1940s, Erik Erikson was working with World War II veterans who had come home physically intact but no longer felt like the same people. He gave their experience a name that stuck: identity crisis (Friedman, 1999). Today the phrase gets attached to almost any restless teenager, yet the identity crisis symptoms researchers actually describe are more specific, and...

Moral Development Theories Compared: Which Still Holds Up?

Six-year-old Maya knocks her grandmother’s vase off a shelf, watches it shatter, and tells everyone the cat did it. Is she scared of punishment? Missing a rule nobody taught her? Short on empathy, or just too young to reason about honesty? Your answer depends on which moral development theories you trust. These theories try to explain how people come to...

Frustration-Aggression Theory: Why the ‘Always’ Rule Failed

Picture yourself second in line for concert tickets when a stranger slips in right in front of you. Now imagine the same thing happening when you’re twelfth in line. Most people get far angrier in the first situation, and a classic field study found exactly that. Frustration-aggression theory explains why: when a goal gets blocked, the urge to strike back...

Developmental Tasks Examples: 12 Real Cases From Age 1 to 72

A 15-month-old lets go of the coffee table. A 52-year-old takes a phone call about his mother’s broken hip. A retired teacher wakes up on a Monday with nowhere to be. Each one is facing a developmental task: a challenge that shows up at a fairly predictable point in life and shapes how ready a person is for the next...

Havighurst’s Developmental Tasks: Life Stages & Teachable Moments

Why does a 16-year-old suddenly care about the career quiz that bored them at 12? Robert Havighurst would say the task arrived. Havighurst developmental tasks are the skills, attitudes and roles people are expected to master at certain points in life, from learning to walk to adjusting to retirement. Each task shows up when the body, society and the person...

Robbers Cave Experiment Summary: The Part Sherif Left Out

In the summer of 1954, 22 eleven-year-old boys arrived at a camp in the Oklahoma hills expecting swimming, hiking, and campfires. Their friendly counselors were actually psychologists, quietly taking notes. Within days, the boys were burning flags and planning raids on each other’s cabins. The Robbers Cave experiment went on to become one of the most retold studies in social...