Digital dementia is when people rely on digital devices like personal computers or cellular phones to the extent that they cannot even recall their own phone numbers.
According to a Japanese research institute, the following are symptoms of digital dementia. The only phone numbers you know are work numbers and home numbers.
Almost 80 percent of your communication with friends takes place on the Internet. You can't remember what you had for dinner yesterday. You rarely write except when signing credit card bills. A person you thought you met for the first time was actually someone you'd met in the past. You keep repeating the same things. You don't look at the maps after installing a navigation device in the car.
If only half of these symptoms apply to you, you have digital dementia. People suffering from digital dementia must train their memory by memorizing phone numbers or poems.