Reliability coefficients are a method of quantifying the reliability of tests, in order to allow us to compare them. A test‟s reliability coefficient is between zero and 1, with the two hypothetical extremes meaning absolutely no reliability and complete reliability respectively (Hughes, 2003: 38-39). The level of reliability which we might reasonably expect depends on the type of language test. Lado (1961, in Hughes, 2003:39) suggests the following levels: