Content validity relates to the extent to which a test's content is proportionally representative of all of the construct's features (Moritoshi, 2001). However, a phenomenon as complex as a language skill does not lend itself easily to the creation of comprehensive constructs. For this reason the language test writer often chooses an inductive rather than deductive approach, selecting item content a posteriori based on some rationally chosen representative sample and then assuming that the sample adequately represents the whole. Content validity is then considered to be a proxy for construct validity.