1. WHAT INFLUENCES INTELLIGENCE?

2. GENETIC INFLUENCES
Kinship Study: IQ scores of identical twins are more similar than those of any other group
Same holds true even when twins are reared apart
Hereditability: extent to which variations in a trait from person to person can be explained by genetic factors

3. HOME AND PARENTING Parents: Emotionally and verbally responsive
Provide enjoyable & educational toys
Involved in children’s activities
Provide varied daily experiences during preschool years
Provide well-organized and safe home environment
Encouraged to be independent

4. PRESCHOOL/HEAD START
Increase IQ scores, achievement test scores and academic skills
Less likely to repeat a grade or be classified
More likely to finish college

5. ADULTS & INTELLIGENCE Level of income Level of education
Stimulating jobs
Intact family life
Travel, read, attend cultural events
Married to spouse of same IQ level
Flexible personality