Chapter 9

• General intelligence
• s= specific abilities
• g x s = performance

fluid = ability to learn and solve new problems. highly correlated with g. decreases with age

• crystalized: accumulated knowledge built up over time
• increases with age

intelligence is a whole bunch of different cognitive skills that are separate from each other but work together

3 distinct types of intelligence: Analytic, practical, creative

analytical is reasoning logically, comparing, analyzing, evaluating. Book smarts. Correlates best with IQ


Practical is using the things you know in everyday contexts. street smarts.

Creative is inventing or designing solutions to new problems

• brain size
• efficiency (less brain activity in ppl who r good at task)
• speed of information processing
• memory capacity
• location

• mean = 100
• s.d = 15

person with IQ of 100 is in the 50th percentile, 0 sd from the mean, and is average


person with IQ of 70 is sd of -2 and is in the 2nd percentile and is borderline retarded