Appendix A: Supplemental Charts, Graphs, and Tables

Often, examining specific data is useful, even fascinating, to developmental researchers. The particular numbers reveal trends and nuances not apparent from a more general view. Each chart, graph or table in this appendix contains information that may challenge some of your common assumptions.

The Human Brain  A-2

Children and Elders as a Proportion of a Nation’s Population A-3

Ethnic Composition of the U.S. Population A-4

The Genetics of Blood Types A-5

Odds of Down Syndrome by Maternal Age and Gestational Age A-6

Breast-Feeding in the United States A-7

Breast-Feeding Around the World A-7

Saving Lives: Immunization A-8, A-9

From Babbling to Language A-9

Height Gains from Birth to Age 18 A-10

Weight Gains from Birth to Age 18 A-11

Body Mass Index A-12

IQ Scores A-12

Children Are the Poorest Americans A-13

DSM-5 Criteria for Attention-Deficit/Hyperactivity Disorder (ADHD) A-14

DSM-5 Criteria for Autism Spectrum Disorder A-15

Motivation or Achievement? A-16

Major Sexually Transmitted Infections: Some Basics A-17

Sexual Behaviors of U.S. High School Students, 2011 A-18

Smoking Behavior Among U.S. High School Students, 1991–2011 A-19

Demographic Changes A-20

Suicide Rates in the United States A-21