According to research carried out by Dr Tracy Alloway from the University of Sterling, Sudoku stretches the working memory, as does keeping up with friends on Facebook.
However, the instantaneous nature of texting, Twitter and YouTube is not healthy for working memory, according to findings.
As the Daily Telegraph reports: ''On Twitter you receive an endless stream of information, but it's also very succinct. You don't have to process that information.
''Your attention span is being reduced and you're not engaging your brain and improving nerve connections."
If people constantly just skim Twitter, I can see her point. However, I’d imagine it’s the way in which it's used that matters. For example, often tweets carry urls which link through to more in-depth news articles and the like which obviously require more concentration to read.
Likewise, if you just glance through your Facebook homepage to have a nose at what your friends are up to in a very superficial and non-engaging way, you’re not going to indulge your brain in any great amount of deep thought.
As a result, it’s the nature of the user rather than the platform which I’d guess dictates the effect the latter has on the former.