语言测试教案3市公开课获奖课件省名师优质课赛课一等奖课件.pptVIP

ChapterThree

SomeEssentialelementsinmaintainingorevaluatingtestquality

（语言测试基本要素）1/9

Whatdoweneedtoknow?Teachingobjectivesofthischapter：whatistestreliability？Howcanwecheckthetestreliability?whatistestvalidity？Howmanykindsofvalidities？whatistherelationshipbetweentestreliabilityandvalidity？theotherelementsinlanguagetesting.2/9

I.Whatistestreliability?

语言测试信度，指是测试结果是否可靠可信。（李筱菊，1997）AccordingtoHenning(),reliabilityisameasureofaccuracy,consistency,dependability,orfairnessofscoresresultingfromadministrationofaparticularexamination.Fortheindividual,however,thereliabilityissaidtobeassociatedwiththetendencyofhisorherscorenottovarywithrepeatedmeasurement.3/9

II.Howcanyoumeasure

thetestingreliabilityinpractice?Threeways:1.test-retesttestingmethod(重复测试法）.(consistencyovertime)2.parallel-formtestingmethod(平行卷测试法）(consistencyinform)3.split-halftestingmethod.（对半分析法）(internalconsistency)4/9

III、Whatistestvalidity?语言测试效度也称有效性,指测试所考,是否就是所要考,或者说,在多大程度上是考了目标所要考（李筱菊,1997）。Validityingeneralreferstotheappropriatenessofagiventestoranyofitscomponentpartsasameasureofwhatitissupposedtomeasure.Atestissaidtobevalidtotheextentthatitmeasureswhatitissupposedtomeasure.Validitymaybedeterminedinavarietyofways.5/9

Facevalidity表面效度ClarificationoftestvalidityfacrfacrfacrContentvalidity内容效度Criteria-relatedvalidity尺度关联效度Constructvalidity结构效度6/9

IV、ValidityinRelationto

Reliability

Usually,itispossibleforatesttobereliablewithoutbeingvalidforaspecifiedpurpose,butitisnotpossibleforatesttobevalidwithoutfirstbeingreliable.7/9

V.someotherelementsinlanguagetestingAuthenticity真实性Involvement交互性Washbackeffect后效作用Practicality可操作性8/9

Whathaveyougotfromthelessontoday?Whathaveyougotfr