Not true
TesTeq said:
You can teach the blind person what color pairs look good together but she/he will never see it. . .The consistent practice won't help.
No -- you
can't teach a blind person what colors look good together.
We're not talking here about a severe structural problem in the nervous system. If a person's optic nerve is severed, absolutely no visual signals will reach the brain for perceptual processing. Or if there is a huge lesion in brain area V1. Or any number of other structural deficits. Nothing can be seen because there is no signal to interpret, or a severely degraded signal.
But all interpretation is learned with experience. And it MUST be learned. Yes, a healthy retina is necessary to see. But you also have to
learn to see -- learn to interpret the signals from the retina. Object recognition doesn't come pre-loaded and working from birth. Nor color recognition. It's all learned. This learning happens most rapidly in the first 2 years of life, but can continue throughout life.
Human babies are born with very limited sight. Their brains learn over time to interpret the visual signal from (unimpaired) retinas with ever-increasing sophistication.
If you were to put blinders on an infant from birth, then remove them after a couple years, the child would be functionally blind for life. The signals sent from the retina would be normal, but the perceptual interpretation in the brain that allows you to "see" would never have been learned. The critical period for the brain to
learn to interpret the visual signals would have been missed.
Parents do the opposite with their babies. They go out of their way to stimulate the baby's vision with colorful toys and books. They teach their toddlers to name colors and objects. The child is exposed to a variety of stimuli and taught to name differences between them. Repeatedly. For years. A massive amount of learning experience is needed just for typical, normal adult vision.
Visual perception can be learned and fine-tuned in adulthood as well. You can teach an adult with normal retinas to discriminate fine shades of color they couldn't discriminate ("see") before. An interior designer can learn to distinguish and name different shades of white in a Benjamin Moore color deck. A lab technician can learn to distinguish relevant patterns in the very noisy picture in a mammogram.
In music education, students are exposed to a variety of stimuli and taught to discriminate and name differences between them. The process is essentially the same as teaching an infant to see.
There is apparently no
special structure in the nervous system that is necessary to learn to waterski. Of course a quadriplegic cannot learn, because you do need an intact spinal cord sending and receiving signals to the leg muscles. But assuming you have an intact spinal cord, you can learn to waterski if you want to.
There is apparently no
special brain structure for music either. If you can hear, you can learn to identify and name chords if you take the time to do so. You just need to learn to interpret signals from the auditory nerve. If your auditory nerve can transmit the signal, your brain can learn to interpret it and discriminate ever-finer differences between signals.