A study reveals our brain development changes at ages 9, 32, 66 and 83.

Rheumatoid arthritis advances through four stages—early, moderate, severe, and end stage—each marked by increasing joint damage and functional limitations. Rheumatoid arthritis progression can vary ...

Emotions may feel like a rollercoaster after experiencing a loss. Whether you’re grieving the death of a loved one, a relationship, a dream job, or are grappling with a health diagnosis, handling ...

Cancer stages refer to the type of cancer a person has, the size of the initial tumor, and whether or not the cancer has spread to other areas of the body. Cancer staging can vary between types of ...

I like to play a game with the college students in some of my psychology courses. I hold up some juicy prize—a gift card to a local coffee shop, bookstore, or restaurant—and promise it to the first ...

Understanding the stages of aging may help you make important decisions about your health and aging well. Aging is a natural experience that lasts a lifetime. It’s a biological process that involves ...

Piaget’s stages of development include sensorimotor, preoperational, concrete operational, and formal operational. While there is some criticism of them, they may help characterize child development.