David Snowdon / Aging with Grace

The world of abbeys is suitable for medical studies. All nuns never smoke and have the same situation of medical treatment, meal and living. Due to the same situations comparative research is easy. Why do some nuns have Alzheimer disease and other nuns not under such the same situations? The author, David Snowdon (Ph.D.), focused on this point and studied it.

The fact he found at first surprised me who know next to nothing about aging. The better educated nuns, the less death rate they have at all age. Research at Massachusetts (of the public) before this study showed the same results. However, this research showed people who graduated only elementary school have higher smoking rate and lower level medical treatment than other educated people. They have the cause. On the other hand, nuns also have the same tendency under the equal environments.

Proceeding the study, the author realized the existence of precious documents for study at abbeys. They are short autobiographies that nuns wrote when they entered abbeys. He assumed that he could research the relationship between Alzheimer disease and nuns' intelligence at their younger age. Then, he turned to Dr. Susan Kemper, who is the specialist for aging and language ability.

Dr. Kemper proposed him the research for "meaning density" of sentences in nuns' autobiographies. "Meaning density" is the number of propositions in every ten words. The author researched the mutual relations of "meaning density" in nuns' autobiographies at their younger ages and the cognition tests results for Alzheimer disease at their older ages. After that, he found clear correlations between the two.

In other words, people who had the high literate abilities to write high "meaning density" sentences tended to have a smaller chance to develop Alzheimer disease.

However, some people criticized the way of this study. They say, such high-meaning-density sentences might be relatively too complex and unintelligible. The unintelligible sentences show writers' low language ability. The author argued that all the autobiographies that they analyzed featured correct grammar and expressed clear thought properly. He declared that high-meaning-density sentences never mean unintelligible.

On the other hand, the author had the question as follows: Hemmingway's sentences are famous for his concise style. If we analyze his sentences, what result do we find? Dr. Kemper's reply: High-meaning-density sentences don't always compose excellent literature.

It surprised me that language ability at younger ages affects everyday life at older ages. It might be natural that we want to do something for our children for their future lives. Dr. Kemper gives us good advice, the answer is read to children. According to her advice, meaning density depends on vocabulary and the ability to read and understand. She said that to increase vocabulary and the ability to read, the best way is to read books to a child when he / she are infant.

Of course, the cause of Alzheimer disease isn't only language ability. It depends on genes, habit of smoking, having enough vegetables. This book gave me a new viewpoint as even the language ability affecting Alzheimer as the same way of other facts.

It was also interesting to me, the way found the results. Not only the author but also the Sisters co-operated in the study. They hand in their writings, tests and their brain after their death. I was intrigued by both the unexpected results and the process of the study.