Dyslexia: What It Can Teach Us :: Biology Essays Research Papers

Dyslexia: What It Can Teach Us What is a learning disorder and what can knowing more about learning disorders tell us about our own learning? Scientific research has acknowledged that many learning disorders are really just the edge of what is the normal spectrum in human capabilities.(1) Children with reading disabilities differ from one another and from other readers along a continuous distribution.(2) The aptitude to read depends upon fast and precise understanding and decoding of single words.(2) A disabled readers IQ tells very little about their skills. Disabled readers with varying IQ can display exactly the same progress, and neurobiological symptoms. This tells us that the IQ is not a suitable indicator of disability in basic reading skills. That is just one example of the many things that we can learn from people with learning disabilities that we can apply to all people. We will also see that by studying students with dyslexia we can see some of the important brain functions in reading. For a long time, research in the scientific community in respect to learning disabilities was slim. One problem in recent decades is that scientists have spent a lot of time searching for the basis of the disorder as opposed to the solution. This has created a chasm between the scientific and the educational worlds. Teachers were experiencing frustration with the influence that PhD's and MD's have on their curriculum.(2) Some teachers feel that when help is provided it can be in a non-helpful manner. Researchers don't always take into consideration what it was really like to be teaching. When we think about learning in a broad scale we think about it as repetition of memorization. On a cellular level learning is the result of change in the strength of a connection due to synaptic activity.(3) At larger levels Hebbian ideals can't really be taken much farther than simple behaviors. We can use Hebbian learning to explain repetitive actions that allow us to learn, say a piece of music. A musician plays a piece of music over and over again, until he/she knows it really well. At this point the synapses that were being used in the musicians brain have physically and chemically changed so that there is now a stronger connection. Can we explain learning disorders with Hebbian theory? Surprisingly we can. It turns out that dyslexics fail to increase activation in order to make the connections between phonologic structures and sounds.