目录 Chapter 1 Invitations to Linguistics Chapter 2 Speech Sounds Chapter 3 From Morpheme to Phrase Chapter 4 From Word to Text Chapter 5 Meaning Chapter 6 Language and Cognition Chapter 7 Language, Culture and Society Chapter 8 Language in Use Chapter 9 Language and Literature Chapter 10 Language and Computer Chapter 11 Language and Foreign Language Teaching Chapter 12 Theories and Schools of Modern Linguistics 综合测试
精彩内容 (2) Reliability: Reliability can be defined as consistency. If a test produces the same or very similar results when given to the same candidate twice in succession or marked by different people, it is regarded as having high degree of reliability. Reliability can be affected by two kinds of error. The extrinsic sources of error consist of the variability of the testers and testees, and the variability of the test situation. The intrinsic sources of error are within the test itself. These occur when there is a lack of stability or equivalence. a. stability reliability. A measuring device is stable ifit gives the same reading when uscd twice on the same object, assuming there is no change in the object between the two measurements stability reliability is also called test-retest reliability, because it is estimated by testing and retesting the same candidates, and then correlating their scores. b. Equivalence reliability. A measuring device is equivalent to another if they produce the same results when used on the same objects. To estimate equivalence reliability, the tester can either construct two parallel tests with the same items of the same degree of difficulty, or compare two tests of similar nature. (3)Validity and reliability under criticism: Many people who take the communicative approach to language teaching cast doubts on validity and reliability as standard test requirements. One of their reasons is that there does not exist an absolute validity.If its theoretical foundation is linguistic competence, test with high contentconstruct or concurrent validity may still fail to show how well the learner can use the language in communicative contexts. Therefore, validity only exists in correspondence with specified criteria. If the criteria themselves are not appropriate, then the validity of the test is not of much value. Classified by different aims, there are at least four major types of test: (1) Aptitude test: Aptitude test attempts to measure the learner's aptitude or natural abilities to learn languages. This type of test usually consists of several different tests which measure respectively the ability to identify and remember sound patterns in a new language, the ability to identify the grammatical functions of different parts of sentences, the ability to work out meanings without explanation in a new language, and the ability to remember words, rules and so on in a new language. In order to assess these abilities, artiricial languages are often employed. (2) Proriciency test: The purpose of proficient test is to discover what the testee already knows about the target language. A proriciency test is not concerned with any particular course but the learner-s general level of language mastery. An example of proficiency test is the American TOEFL, which is used to measure the English language proficiency of foreign students who wish to study in the USA. The former EPT and the current PETS tests offered by the Ministry of Educationalso belong to this category. ……
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