After completing this chapter you should be able to:

• Discuss the psychometric approach to intelligence, ways of measuring IQ, and the predictive value of IQ. 
• Compare information-processing, neurological, and componential approaches to intelligence.
• Describe how intelligence develops over the lifespan.
• Analyze biological and contextual influences on group differences in IQ. 
• Discuss how giftedness, intellectual disability, and special needs are identified and healthy development promoted in such individuals.