Erikson, Piaget & Psychology Theories & Concepts Explained

The Oedipus Complex: Freud’s Most Misunderstood Idea

A four year old boy declares he is going to marry his mom, then side eyes his dad for the rest of dinner. Sigmund Freud did not see a passing tantrum. He saw evidence for one of psychology’s most debated ideas, the oedipus complex. Freud argued this unconscious dynamic between boys, mothers, and fathers, playing out between ages three and...

Freud’s Latency Stage of Development: The Quiet Years

Picture a nine-year-old who was inseparable from her best friend a year ago suddenly declaring boys “gross,” disappearing into hours of Lego building, and going quiet the moment anything remotely romantic comes up. Freud had a name for this shift: the latency stage of development, and he argued it is not a lull so much as one of the busiest...

Sampling Methods in Psychology: Which One Would You Actually Use?

Picture a researcher who wants to study test anxiety across a university of 15,000 students. She cannot test everyone, so she has to pick a smaller group that still represents the whole population fairly. That single decision, how she picks her participants, will shape whether her results mean anything at all. This is where the types of sampling methods in...

Cognitive Theories of Motivation: Expectancy-Value and Beyond

A straight-A student turns down an advanced chemistry class she could easily ace. A struggling classmate signs up for it anyway. Same opportunity, same odds of academic success, completely different choices. Expectancy-value theory offers one of the clearest explanations for that kind of split: motivation depends not only on whether someone believes they can succeed, but on whether they believe...

Types of Nonverbal Communication: 8 Signals Your Body Sends

You walk into a job interview, shake hands, and sit down. Before you say a complete sentence, the interviewer has already started forming an opinion of you, based almost entirely on your posture, your expression, and the tone in your voice. Psychologists have spent decades mapping the different types of nonverbal communication that shape these snap judgments, and the signals...

The Sensorimotor Stage: How Babies Build Intelligence One Touch at a Time

An eight-month-old watches her mother slide a toy under a blanket. A month earlier, this would have ended the game entirely, out of sight meant gone for good. Instead, she reaches straight for the blanket and pulls it away. That shift in understanding sits at the center of the sensorimotor stage, the opening chapter of Piaget’s theory of cognitive development....