Eye chart number). The denominator indicates the distance in feet at which a person with normal vision could stand to correctly identify the same symbols identified by the person tested. For example, a visual acuity of 20/20 is considered normal. Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision. There is often also a need to test a subject's vision at near or occupational tasks (such as reading or computer use). For these situations, a Rosenbaum
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