No, that is not my argument. "child-like" sounds rather romanticized and can be misunderstood.
Yes, what I mean is using similar, more direct processes of attention as children do. I notice a certain childlike quality in the most able learners, and children seem to naturally use better methods to learn. I couldn't think of a better word.
It also takes time for neural pathways to form, through repeating actions while being present to what you are doing - to the physical realities around you. The "adult way" is often to jump straight to ideas, concepts, intellectual things, and what I described gets circumvented... If the learning style changes, the results will change.
I think we're looking at this from different angles. I know several teachers who teach adults, and most who I know aren't nearly as bad as many you talk about. They don't treat their adult students fundamentally differently, and might believe that hard work is what brings results and not age. However, the vast majority of their adult students still really struggle. So even when the learning style changes, I have very often not seen good results.
I was against this "hard wax" idea. It was clumsy terminology, so when "neuroplasticity" came along I adopted it. It seemed to reflect my prior ideas - i..e. that the mind has not "hardened into a final form" but is malleable - and that was close enough for me.
Neuroplasticity is absolutely the right term for it. The extent of adult neuroplasticity is hotly debated. I see nowadays that the term has caught on to the point where everyone acknowledges its existence, so the interesting question is how much neuroplasticity adults have, not whether they do.
It began for me with language learning, where supposedly we'll speak with an accent if learning a language later. I think I'm on my 7th language - lost count. Our linguistics prof talked of the "crible phonologique" - the phonological filter. Here we don't hear a foreign sound: we translate it into what we know by passing it through the "filter" of our mother tongue. That's why a German might say "Venn ve valk" instead of "When we walk." even though "w" does not sound at all like "v" - but the written letter W is pronounced V. Or the American "R" when trying to speak French. To get the foreign sound, we have to "listen without a filter" the way a baby does, and also experiment with our bodies to physically produce that sound.
I guess what I keep wondering is whether it's possible to completely learn an accent this way, as opposed to partially learning it and picking up features. I know this can be done, but I don't know how good you can get with it, especially as an adult. I speak multiple languages, and have done similar things. However, I have an (subtle) accent in each of the languages I speak, even those learned early in childhood. That's what I think about quite often. Somehow it was always rather obvious to me to listen carefully to a language to imitate the sounds. But with a good ear, you can usually tell who is "trying to learn new sounds" vs who is "a native speaker who grew up entirely in a certain place". It's not so surface level -- I'm sure East Asian speakers can learn to differentiate l's and r's, and German speakers can pronounce their w's and so on, and I've seen many do it. But to get the entire contour and lilt, and accurate sound bank of new sounds, and to make that very natural is not something I've really seen people succeed at. Otoh acquiring individual sounds and making certain changes can absolutely be done. Does that make sense? Perhaps your experience is different.
This article looks interesting:
https://academic.oup.com/applij/article/41/5/787/5530705?login=falseIn short, it came down to a different interaction with the matter at a very fundamental level. That changed many things. If we do things differently - fundamentally - we get different results. Conversely, the results that are found may be due to how things are done.
I think often when we disagree, it's because you keep saying that doing things differently produces different results, while describing something which I think many good teachers do, and which many students do as well. Like you're talking about many things I've taken for granted for years now, despite which I haven't been able to succeed -- which is what I try to point out.
I don't know how to write this in less words.
On the contrary, I would be interested to hear you write in more depth. Here, you are repeating many things you have said before, and it might be interesting to go into more detail.