Eye chart smaller symbols until the person cannot identify the symbols. The smallest symbols that can be reliably identified is considered the person's visual acuity. The Snellen chart is the most widely used. Alternative types of eye charts include the logMAR chart, Landolt C, E chart, Lea test, Golovin–Sivtsev table, the Rosenbaum chart, and the Jaeger chart. Charts display several rows of optotypes, which are standardized symbols for testing vision. Optotypes are usually letters, numbers, or geometric symbols. Each row of the chart depicts optotypes of a different size. Typically the largest optotypes are in the top row. The optotypes become progressively
Name-letter effect suggests that if the name is liked then the name letters will be liked too. This would occur through repeated visual association of the name letters with the name. Martin and Levey defined evaluative conditioning as a variation of classical conditioning in which we come to like or dislike something through an association. Given the observation that our own name stands out among others as quite an attractive stimulus, as Cherry found in the cocktail party effect, it could be that the name-letter effect results from evaluative conditioning. Feys set up a controlled study with Flemish subjects, pairing unfamiliar symbols