- Subject index
There are between 4,000 and 6,000 languages remaining in the world and the characteristics of these languages vary widely. How could an infant born today master any language in the world, regardless of the language's characteristics?
Chapter 12: Language Across the Life Span
Language Across the Life Span
Over the past 100 years, the average life span in industrialized countries has dramatically increased. The National Institute on Aging (NIA) (n.d.) estimates that by 2030 there will be 1 billion adults who are 65 years old or older in the world. Currently, the number is about 500 million. The number of people who are over 100 years old is increasing [Page 318]about 5.5% each year. There were 455,000 people over 100 years of age in 2009, but it will likely be approximately 4.1 million in 2050 (United Nations, 2002). The worldwide changes in the median age of the population will have far-reaching effects on society Many of us will be able to live to ...