... single administration. For the reason of convenience and satisfaction, KD20 and KD 21 are often chosen more than the others and are considered the two most common formulae (Alderson. J.S. et. al., ... testing2.1.1. What is a language test? There are a wide variety of definitions of a language test which have one point of similarity. That is to say, a language test is considered as a device for measuring ... specification has to include information on the length, the structure of each part of the test, the type of materials with which the candidates will have to engage, the source of materials, the...