Construct validity
The present study is concerned with investigating the construct validity of the IELTS Reading Test. In terms of reading tests, „construct validity‟ is a measure of how closely a test reflects the model of reading underlying the test. In other words, the concept of „construct validity‟ is related to those abilities it is thought readers need to possess in order to handle the demands of the target language domain. In the case of the IELTS Academic Reading Test, this domain is study at university level. Thus, if the ability to scan for specific information is considered an important part of university reading requirements, then the reading construct should include scanning and the test should diagnose the ability to quickly locate specific information (Alderson, 2000). Whilst construct validity is often associated with skills, another dimension is task structure. Bachman and Palmer (1996) suggest that a focus on the structure as well as the skills of target language use tasks might lead to the development of more „authentic‟ test tasks (p.147).
Construct validity
The present study is concerned with investigating the construct validity of the IELTS Reading Test. In terms of reading tests, „construct validity‟ is a measure of how closely a test reflects the model of reading underlying the test. In other words, the concept of „construct validity‟ is related to those abilities it is thought readers need to possess in order to handle the demands of the target language domain. In the case of the IELTS Academic Reading Test, this domain is study at university level. Thus, if the ability to scan for specific information is considered an important part of university reading requirements, then the reading construct should include scanning and the test should diagnose the ability to quickly locate specific information (Alderson, 2000). Whilst construct validity is often associated with skills, another dimension is task structure. Bachman and Palmer (1996) suggest that a focus on the structure as well as the skills of target language use tasks might lead to the development of more „authentic‟ test tasks (p.147).
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