According to an article in the Telegraph that seems to be the case. It’s thought provoking to ponder these effects on non-usage, much like how some people who have never learned how to do math manually as well. The article stated:
Professor Ian Robertson, a neuropsychology expert based at Trinity College Dublin who carried out the study, said: “People have more to remember these days, and they are relying on technology for their memory.
“But the less you use of your memory, the poorer it becomes. This may be reflected in the survey findings which show that the over 50s who grew up committing more to memory report better performance in many areas than those under 30 who are heavily reliant on technology to act as their day to day aide memoir.”
Professor Roberston, who oversaw the research to mark the launch of Puzzler Brain Trainer Magazine, said that a series of five simple exercises a day can help to increase memory capacity.
As many as a third of those surveyed under the age of 30 were unable to recall their home telephone number without resorting to their mobile phones or to notes.