Figure 1. Carrie’s Spelling Lesson LD het do you Waat ty be When You grow up g L wat of he 4 racted you fhow a REED how nas oMmes ard. bil lbng . 7 Ife raw. is #n 0 You be 0 .._ dra. horves, lower Q you. GD be” a ie fog dad v fun h Qlawing o ° ome Figure 2. Ann Example's Writing Sample in dealing with written language sym- bols. Dyslexics have trouble associating abstract symbols with sounds because they cannot readily identify the separate sounds within words.? For them a word with three sounds like bat is no easier to divide into discrete parts than is “MMMMMMM.” Consequently, it is dif- ficult for dyslexics to remember word sequences. For them, “bat” is no more logical than “tab” or “bta,” and “what” could just as soon be “that.” Overall, dyslexics have a weak visual memory for words. However, some of them do well in processing and remem- bering other forms of visual infor- mation—for example, concrete three- dimensional information or nonverbal abstract visual-spatial information. Dyslexics’ problems with sound analy- sis seriously affect their spelling ability. Compare nine-year-old Carrie's work in Figure 1 with teacher's comment to “Listen to the sentence,” and “You don't have time..." Research in neuroscience has pro- vided important facts about dyslexia: 1. Structural differences in the brains of dyslexic persons were noted by Galaburda at Harvard Medical School. In dyslexics, the language portions of the right and left hemis- phere of the brain are symmetrical. This is not typically the case in the nondyslexic population. In addition, dyslexics have different neuronal migration.” This variation appears to begin at about the 16th week of fetal development. Neuronal migra- tion continues over the next eight weeks in an atypical pattern, due to a different “genetic blueprint” for the dyslexic person.!© 2. Alarge percentage of dyslexia cases have a genetic basis. 3. Dyslexia occurs more often in fami- lies with a high incidence of mixed or left handedness. Dyslexics seem to be prone to more than their share of allergies and other immune dis- orders.!! 4. Certain special talents and inherent gifts occur with greater frequency among the dyslexic population, These are often the talents that require a strong three-dimensional spatial aptitude.’? In spite of their written language difficulties, dyslex- ics may have other language talents, such as ability to orally express ideas with clarity and creativity. Dvlexics’ cognitive and rational capacities are generally good or even superior. Dyslexia and Related Learning Differences Dyslexics often have other learning problems. These include the following: ADVENTIST EDUCATION ® SUMMER 1991 8