Erikson, Piaget & Psychology Theories & Concepts Explained

Systematic Desensitization: Steps, Examples & How It Works

Systematic desensitization is a behavioral therapy technique developed by Joseph Wolpe in the 1950s to treat phobias and anxiety disorders. Grounded in the principle of reciprocal inhibition — the idea that deep relaxation and intense anxiety cannot coexist — it guides clients through three structured steps: mastering relaxation, building a personalized anxiety hierarchy, and gradually confronting feared stimuli. The result...

Conservation in Piaget’s Theory: 5 Tasks, Stages & Why Children Fail

Conservation in psychology is the understanding that quantity stays constant even when the appearance of an object changes. It’s one of six cognitive abilities children develop during Piaget’s concrete operational stage (ages 7–11) — the period when logical thinking first takes hold. Before conservation develops, children are routinely misled by how things look: a taller glass seems to hold more...

Piaget’s 4 Stages of Cognitive Development: Ages, Examples & Chart

Piaget’s theory of cognitive development proposes that children move through four universal stages — sensorimotor, preoperational, concrete operational, and formal operational — each representing a qualitatively different way of thinking, not just a lesser version of adult reasoning. Swiss psychologist Jean Piaget was the first to map this progression systematically, and his findings permanently changed how educators design instruction, how...

Concrete Operational Stage: Examples, Characteristics & Key Skills (Ages 7–11)

The concrete operational stage is the third of Jean Piaget’s four stages of cognitive development, spanning roughly ages 7 to 11. It marks one of the most significant transitions in childhood cognition: children move from intuitive, appearance-driven thinking to genuinely logical reasoning. The catch is that this logic is tethered to the physical world. Children reason well about things they...

Brain Hemispheres: Left vs Right Functions, Split-Brain Research & What Science Says

The brain hemispheres you’ve heard so much about are not the two separate processors people imagine. Every quiz that labels you “left-brained” or “right-brained” is built on a framework that neuroscience dismantled decades ago. Your left and right hemispheres are physically distinct and do show some specialized tendencies, but they function as a tightly integrated team, communicating millions of times...

The Electra Complex: Definition, Origins, and What Freud Actually Said

The electra complex is a psychoanalytic concept describing girls’ unconscious attachment to their fathers and rivalry with their mothers during the phallic stage of development, roughly between ages three and six. It sits alongside the Oedipus complex as part of Freud’s theory of psychosexual development — but with a notable twist: the theorist most associated with it never actually accepted...