Fluid vs. Crystallized intelligence

Practicing certain lifestyle habits may help improve your overall intelligence, which includes two types:

• Crystallized intelligence. This refers to your vocabulary, knowledge, and skills. Crystallized intelligence typically increases as you get older.

• Fluid intelligence is the ability to reason, analyze, and solve unique problems. It is highest in early adulthood and diminishes in one's 30s and 40s.
• Crystallized intelligence is the ability to use knowledge gained in the past. It relies on accumu...

Charles Spearman (British psychologist, 1863–1945) described a concept he referred to as general intelligence or the "g factor". He utilized the method named 'factor analysis' to investigate a few mental ability tests; his conclusion was that the results and scores on these tests were very simila...