@Stigma
Looking at your previous post, I do find that you said it first, and more succinctly.
The misuse of the findings of psychological research, whether as a practical guide or, even worse, as bad philosophy, has long irritated me. When I read the thread I immediately determined to post a reply, and while I read the article you cited, I didn't take time properly to absorb the rest of your post. Evidently we reacted to Gobet and Jansen in much the same way, which is pleasing, since I respect your opinion.
Regarding de la Maza, I agree that spending many, many hours doing tactics diagrams with increasing rapidity is bound to be beneficial. I only question its value relative to other programs of comparable intensity. My response to him must also be colored by my strong aesthetic reaction to his book--it struck me as arrogant, oblivious, and crude in its thinking: the frank, hard-hitting thinking of the voice-over in an advertisement, expressed with the charm of an engineer rather than of a salesman. As far as his attitude to master play is concerned, I don't think he believes that masters play badly, but somehow he still manages to dismiss the accumulated chess wisdom of humanity since Greco as useless to most players.
That is certainly not justified, for, if nothing else, understanding strategic play (including attacking strategy), and the master games in which it shines out best, gives enormous pleasure. This point relates to the issue of motivation that you emphasized. Without that pleasure of understanding, training seriously for competitive chess would, I imagine, feel like training for a bewildering Thunderdome, or again like studying for a mathematics class with no insights, only endless examinations, with humiliation for those who make arithmetic mistakes. Who could want that to continue for long? (Maybe I shouldn't ask.) One of most revealing facts about his rapid improvement program is that, even for its originator, it also proved to be a rapid retirement program.
Anyway, thanks for your original thoughts and for the very useful reference.