Snellen chart H, K, O, S, 3, U, Y, A, C, E, G, L, 2. The normal Snellen chart is printed with eleven lines of block letters. The first line consists of one very large letter, which may be one of several letters, for example E, H, or N. Subsequent rows have increasing numbers of letters that decrease in size. A person taking the test covers one eye from 6 metres or 20 feet away, and reads aloud the letters of each row, beginning at the top. The smallest row that can be read accurately indicates the visual acuity in that specific
Name-letter effect thought. They had to mark their first preference with 1, their second with 2, etc. The new method was first applied in Belgium. When results showed the name-letter effect at work again, it was copied in the other countries. A total of 2,047 subjects participated, all students. Across languages and letters, the average probability of a letter being chosen as one of the six preferred letters was 0.30 for name letters and 0.20 for other letters. The strongest effects were observed in the Norwegian and Finnish studies. In the Hungarian, Portuguese, and Italian studies the effect was present but not