So many variables unmeasured. How many hours per week? What sort of job? Something the parent finds meaning and purpose in, or just a paycheck? Surely these moderate the sign of the outcome
I suspect it goes deeper than language even. We have associative memories, right? Given our learning, modelling, pigeonholing of the world along with our changing bodies, our older selves are unlikely to experience anything close enough to what our younger selves experienced to trigger that association and recall the memory.
I'm approaching 70, and my mental model is that the graph is getting so big that it's getting harder to navigate through it to the memories I'm looking for.
Yes. As the saying goes, If we knew what we were doing it wouldn't be research. Finished papers often have flaws, if you try to write something perfect you may never finish it. They're called limitations and you list them in conclusions and suggest addressing in future work.
While we're here, any suggestions on what works better for writing math to a digital whiteboard? Wacom type tablet with no display, or an ipad type tablet with pen?
A display is much better for this. I recommend Samsung tablets, as the Wacom stylus they use can't awkwardly run out of battery on you in the middle of a class.
This is a very personal choice. A Surface-style tablet pc works best for me. The accuracy difference between an "active" Wacom pen and a glorified piece of plastic is noticeable. Display-less Wacoms have a much steeper learning curve before you produce good handwriting.
I would imagine something where you can see the immediate results of what you're writing under your pen to be better, otherwise you'd have to be facing the board somehow and not the class