All I have to offer is nothing more than personal anecdotes.
I think there is a "habitual framework of the mind" that we condition ourselves to operate, and that it's a side-effect of the ways we consume information on a daily basis.
Now we simply want to learn about what big event happened moments after it happened. We want to be entertained in our free time and there's a surplus of ways to achieve it, to the point where we can even desensitize ourselves by chasing more triggers than before. Another opinionated and not so scientific book about this subject is "the shallows what the internet is doing to our brains".
Last but not least, I don't believe that this is simply a matter of aging. Correlation does not imply causation. It takes time for the mind to get into this state but I don't think it's just the passing of time that causes it, but also what you're doing with. A sufficiently accurate metaphor would be that of the person who exercises daily to maintain a level of fitness that's deemed "very good" for their age. I'm ashamed to admit that my grandfather would easily fall in this category. My grandparents lived far away from town and they worked in the fields, biking etc. daily. As a result my grandfather could easily kick the lights out of me if he wanted to. That's how much of a chair slug I am.
And just like there can be a wide discrepancy of physical strength that correlates with habits and activities, so can it happen for mental strength or parts of which in our case is concentration, information recalling and memorizing new things.
I think there is a "habitual framework of the mind" that we condition ourselves to operate, and that it's a side-effect of the ways we consume information on a daily basis.
Now we simply want to learn about what big event happened moments after it happened. We want to be entertained in our free time and there's a surplus of ways to achieve it, to the point where we can even desensitize ourselves by chasing more triggers than before. Another opinionated and not so scientific book about this subject is "the shallows what the internet is doing to our brains".
Last but not least, I don't believe that this is simply a matter of aging. Correlation does not imply causation. It takes time for the mind to get into this state but I don't think it's just the passing of time that causes it, but also what you're doing with. A sufficiently accurate metaphor would be that of the person who exercises daily to maintain a level of fitness that's deemed "very good" for their age. I'm ashamed to admit that my grandfather would easily fall in this category. My grandparents lived far away from town and they worked in the fields, biking etc. daily. As a result my grandfather could easily kick the lights out of me if he wanted to. That's how much of a chair slug I am.
And just like there can be a wide discrepancy of physical strength that correlates with habits and activities, so can it happen for mental strength or parts of which in our case is concentration, information recalling and memorizing new things.