“Perceptual learning is self-regulated, in the sense that modification occurs without the necessity of external reinforcement. It is stimulus-oriented, with the goal of extracting and reducing”
via Learning to See Data – NYTimes.com.
More technically this is called “unsupervised learning”, and this happens at an especially rapid pace in children. See my past post from first hand experience of seeing my kids learn, and also the follow-on post on the role of supervision.
Unsupervised and supervised learning play an extremely complimentary role. In humans, it also happens to be the case that unsupervised learning happens dominantly at the perceptual/sensory level, while supervision happens typically at a higher cognitive level. There is no mathematical necessity that it should always be on, but this is rather dictated by the “cost” of supervision. Supervision is vastly more costly than unsupervised learning and so it is invariable better to do it at a higher level (of abstractions, condensed concepts) rather than at the level of elementary signals.
So for example, a violin teacher may supervise her students about how to play a phrase with the right emotion, dynamics and emphasis, and get them all to play it quite similarly over time. But each of her students may “see” or “feel” the notes and their structure in a very personal and quintessential way. This is also the reason some players will learn much faster than other. We attribute this to a natural proclivity to music or a musical instrument, but I think this is more specifically due to the way different people have developed different ability to perceive written and played music, as well as interpret the physical muscular feedback as they play it.
And because this perceptive process is learnt automatically (unsupervised) over time, especially in childhood, music teachers strongly recommend that you keep listening to music (especially the instrument you are learning to play) all the time even when you are doing other stuff. Unconsciously, even as our higher brain is engaged in other tasks, our ears are capturing the sound waves, and our auditory system is creating/strengthening neural networks to process, interpret and represent them internally in more compact form. So then any supervised learning on top of that can happen much more quickly.
Other than genetic inheritance, this is also the reason why it is more likely that kids of musicians are more likely to be musicians, kids of engineers are more likely to be engineers etc. It is because they are exposed to the raw signals of the field much more often than the general population and hence they have a far better chance of developing expertise in that field.
And this is exactly what the nature vs nurture debate is. Based on evidence from genetics, the “nature” camp likes to associate “talent” with genetic inheritance and calls it an evolutionary artifact. (Some religious minded folks will call it a “god given gift”, which is ironic since a significant portion of religious people tend to be incredulous about Darwinian evolution!) The people in the “nurture” camp will on the other hand use the evidence from studies like this article and say that talent comes from regular exposure and access to the field from a very early age.
The truth is probably that it is a combination of both nature and nurture. But merely stating this almost self-evident fact and then stopping the debate is an intellectual “punt”. We need to find out where exactly is the boundary between nature and nurture. Is its location different for different fields like art, music, science, engineering, finance, leadership etc? Is the location different for different people? And most importantly, what are the implications of these findings for our education system? This is, after all, not simply an academic debate! By having a perverse and pig headed view of learning and talent development, our education system may be silently condemning millions of kids to drab fulfilling lives!
So this is research that is worth making heavy investment in. High profile scientific projects like exploring our cosmos (space missions) or the nature of elementary physics (Large Hadron Collider) or charting the human genome, are expensive and high profile projects, and yes they are indeed worthwhile in my opinion. However, understanding the human mind, and how it learns, is an equally important project, and we do not see much visibility given to that. (There is still a “vodoo” aura to psychological sciences, which needs to be dispelled.)
To our current knowledge, the human mind (and I am purposely not using the word “brain”) is the most beautiful and complex structure in the universe. It is worth charting out that territory in detail!