author, John Cacioppo, said that makes health impacts from loneliness — including sleep disruptions, depression, elevated blood pressure and increased production of stress hormones — twice as likely to kill an older person as obesity.
Senior moment: How the Internet is helping the elderly connect →
The key, he and others say, is to develop a reputation for being responsive, but not hyper-responsive.
Can true solitude be found in a wired world? →