Erikson, Piaget & Psychology Theories & Concepts Explained

How Observational Learning Powers the Zone of Proximal Development

Watching someone else perform a skill is often the first step toward learning it yourself — and that simple act of observation sits right at the center of the zone of proximal development. Bandura’s social learning theory identifies attention, retention, reproduction, and motivation as essential processes, while the zone of proximal development emphasizes guided learning with a More Knowledgeable Other....

Group Polarization vs Groupthink: What’s the Real Difference?

When a group of like-minded people gets together to discuss an issue, you might expect them to settle somewhere in the middle. Instead, the opposite often happens — their views become more extreme than when they walked in. This is group polarization, and it’s often confused with a related but distinct phenomenon: groupthink. Both show up in jury rooms, political...

Gender Differences in Havighurst’s Developmental Tasks: How Social Roles Shape Life Stages

Men and women often move through the same life stages along very different social paths, even though the milestones themselves look universal on paper. Havighurst’s developmental tasks theory identified a shared set of markers — achieving independence, selecting a mate, establishing a career, guiding the next generation — but Havighurst (1972) developed this framework in a social context that didn’t...

Freud vs Erikson: How Psychosexual Differs from Psychosocial Development

Freud vs Erikson is one of the most common comparisons students run into in developmental psychology courses, and there’s a good reason for that. Erik Erikson trained directly under Sigmund Freud, yet the theory he eventually built departs from his mentor’s ideas in almost every meaningful way. Freud centered his model on biological drives that resolve by adolescence. Erikson turned...

The Frustration-Aggression Hypothesis: Why Blocked Goals Make People Lash Out

The frustration-aggression hypothesis, introduced by John Dollard, Neal Miller, and their colleagues at Yale in 1939, proposes that frustration — defined as the blocking of a goal-directed behavior — always leads to some form of aggression, and that aggression is always caused by frustration. Few ideas in social psychology sparked as much debate, inspired as much follow-up research, or held...

Groupthink Symptoms: The 8 Warning Signs Before Disaster

Groupthink symptoms show up long before the disaster does — you just have to know what to look for. Groupthink occurs when a cohesive group’s desire for unanimity overrides critical thinking, leading to catastrophic decisions like the Bay of Pigs invasion and the Challenger explosion. Yale psychologist Irving Janis introduced the theory in 1972 after analyzing foreign policy failures, identifying...