Introduction and Overview 

IQ Testing in General

The Validity of IQ Tests

Cultural Bias in IQ Tests

Multiple Intelligence, Creativity, and Emotional Intelligence

The IQs of Different Groups

Racial IQ Differences in the US

East Asian IQ

Sub Sarahan African IQ

Indian IQ

IQ in other regions

Environmental Factors

Poverty/SES Part 1 and Part 2

Stress

Stereotype Threat

Nutrition 

Lead

Family Environment and Adoption Studies

The Flynn Effect

Child Abuse

Evidence for a (partial) Genetic Cause

The Heritability of IQ

Mixed Race Populations Part 1 and Part 2

Racial Differences in IQ Related Genes

Subtest Heritability

Brain Size and Intelligence

Race Difference in Brain Size

Brain Size and Racial Intelligence Differences

Changes in the American Black-White IQ Gap: 1916-2016

Regression to the Mean