1. Part I
Chapter One
Introduction

2. Understanding How and Why
The Scientific Method
The Nature—Nurture Debate
Critical and Sensitive Periods
A CASE TO STUDY: Plasticity and David

3. Including All Kinds of People
Sex Differences
Culture, Ethnicity, And Race
Socioeconomic Status
Finding the Balance

4. Observing Changes over Time
Dynamic Systems
The Historical Context
The Three Domains
A VIEW FROM SCIENCE: Mirror Neurons

5. Using the Scientific Method
Observation
The Experiment
The Survey
Studying Development

6. Cautions and Challenges from Science
Correlation and Causation
Quantity and Quality
Ethics