This is interesting (the whole article is very good),
'In summary, Luria [x] showed that, compared with people who could read and write, the thinking of illiterates is much more tied to the immediate situation (that is, the here-and-now) than to abstract reflections on the past and future. This meant that intellectual tasks which were elementary for literate people, for example simple classification, were difficult or impossible for them. In one of Luria’s experiments, semi-educated and only recently literate collective farm activists were easily able to sort skeins of wool in terms of category, shades of blue, red, yellow and so on. On the other hand illiterate peasant women who, as expert embroiderers, were perfectly well aware of subtle variations of colour, usually named the skeins concretely, with terms like ‘pig’s dung’, ‘a lot of water’, ‘cotton in bloom’, ‘rotten teeth’. When asked to classify the colours into groups, for example shades of brown, the women would say things like ‘It can’t be done, they’re not at all alike; this is like calf’s dung, this is like a peach.’'
'Luria tested illiterate men on their ability to complete simple syllogisms. One sequence went like this: In the North, all bears are white. Novaya Zemlya is in the North. What colour are the bears there? Most of the men were unable to give the correct answer, saying things like, ‘How should I know, I’ve never been to the North. I’ve seen a black bear.’ More crucially, people also seemed not to have much conception of themselves as individuals. For example when asked questions such as ‘What sort of person would you say you were?’ illiterates were unable to describe themselves and suggested to Luria and his assistants that they should ask some else to answer for them.'
'Luria realized that such responses were not due to lack of intelligence, but to the structure imposed on thought by illiteracy. Literacy continues the process of individualisation initiated by the ability to speak, but with much greater impact. Literacy extends memory, permits us to classify and to generalize and gives us the ability to move in our imagination out of the concrete here-and-now and into lengthy abstraction. Above all, literacy opens the possibility of a private world and the ability to have a uniquely personal point of view, limited only by the size of one’s library. In an important sense, literacy opens the door to personal freedom.'
This is Chapter 9 from David Hay’s book Something There: The Biology of the Human Spirit, published in London by Darton, Longman & Todd, 2006. ISBN 0-232-53637-0; and in Philadelphia by Templeton Press in 2007. ISBN-10: 1599471140; ISBN-13: 978-1599471143.
www.theosthinktank.co.uk