Maddie is in her mid-30s and has a flourishing career. She feels competent and successful owing to the knowledge and experience she has gained in her chosen career. Maddie's increasing knowledge exemplifies .

crystallized intelligence

Explanation:

Crystallized intelligence (gc)

This is simply known as an application, putting into work things we have learned already. The knowledge we have as individuals is used to solve problems or give solutions to problems that are similar to those we have already encountered it consists of verbal material tests and usually does not decline with age.

It is also defined as the retaining capabilities of individuals and use knowledge that was acquired through experience. It was part of the hypothesis by Raymond Cattell based on the Spearman's idea.

Maddie as a young competent, knowledgeable lady with a good career and good working experience in her career field shows the display or use of crystalized knowledge/intelligence.