Erikson, Piaget & Psychology Theories & Concepts Explained

Assimilation vs Accommodation: Why Kids Call a Zebra a Horse

Ever wonder why a toddler calls every four-legged animal a dog, or insists a zebra is just a stripy horse? Piaget had an answer, and it comes down to two processes that sit at the center of assimilation vs accommodation: how children either stretch their existing mental categories to fit new information, or rebuild those categories when the old ones...

Why Egocentrism Isn’t What Most People Think It Is

A toddler who covers their eyes and shouts “You can’t see me!” is showing a mild form of egocentrism — and so is the teenager who spends an hour agonizing over a photo, convinced the whole school will notice every detail. Neither one is being selfish. What looks like self-centeredness is actually a cognitive stage tied to how the developing...

Anal Retentive vs Anal Expulsive: What Freud Really Meant

People throw around “anal retentive” to describe a coworker who color-codes their spreadsheets, but the phrase actually traces back to a specific stage in Freud’s theory of personality development, and the story behind it is stranger than the meme suggests. The anal stage occurs between roughly 18 months and 3 years old, when toilet training becomes the child’s first real...

Operant Conditioning: Where Most People Get Confused

Ask any psychology student to explain the difference between negative reinforcement and punishment, and watch the hesitation set in. The core idea behind operant conditioning — that consequences shape behavior — is simple enough on its own, but the terminology built around it trips up even strong students, mostly because “positive” and “negative” don’t mean what they mean in everyday...

Middle Childhood Developmental Tasks: Havighurst’s 7 Key Milestones

Not every child moves through middle childhood on schedule, and that gap is often where problems quietly take root. Between ages 6 and 12, Robert Havighurst’s middle childhood developmental tasks theory identifies seven milestones a child needs to work through to enter adolescence on solid footing, and a child who stalls on even one of them can end up struggling...

Trust vs Mistrust: The Caregiving Pattern That Builds Hope

A four-month-old wakes crying at 2 AM. In one household, a parent arrives within a minute, checks the diaper, and feeds the baby back to sleep. In another, the same cry sometimes brings comfort and sometimes goes unanswered for twenty minutes, with no pattern either way. Erik Erikson argued that thousands of moments like these, repeated across an infant’s first...