jeffrey kay has been analyzing the data for more than 450 households since 2004. these dots represent time spent in bed, the bathroom, on the computer, or phone. they're all clues indicating areas of possible decline. >> good to see you, honey. >> reporter: the ultimate goal? arming doctors and care givers with information a patient may not mention or remember. >> knowing as early as possible what's happening and what the options might be becomes very important. >> reporter: with a rapidly growing older population, in home monitoring technology might be able to delay hospitalization and reduce health care costs. >> the majority are willing to give up a little bit of privacy in order to stay independent in their homes if that's what it means in terms of using technology. >> technology can be as simple and inexpensive as skyper e-mail. that robot you saw costs about $7,000. sometimes really wired houses can run up into the hundreds of thousands, but increasingly, insurance companies are willing to pay for some of those costs because it's cheaper to keep an older, ac