thoughisuniversallyacknowledgedthatvalidityisoneofthemostimportantqualitiesofatest,itsmeaningandscopehavechangedalotinthehistoryoflanguagetesting.InthepastvalidityWasconsideredasaninternalqualityofatest.“Doesatestmeasurewhatitissupposedtomeasure?Ifitdoes,itisvalid”(Lado,961,p.321).Therehasbeenareliability-prerequisiteviewwhichbelievedthatavalidtestmustbereliablefirst.Inthissense,atestwasthoughttobevalidifitcorrelatedhighlywithothervalidandreliablelanguagetests.Thiscorrelation-basedvaliditywaslatercalledthecriterion-relatedvalidity,ypeofvaliditywhenothervaliditiessuchascontent.relatedvalidityandconstructvaliditywereproposed.Thecontent—relatedvaliditywasaboutexpertjudgmentoftestcontent,andconstructvaliditywasatfirstconsideredasthetestresult’Sconsistencywiththeory-basedexpectations.petencewas
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