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by Wen-shuenn Wu Chung Hua University (CHU) wswu@chu.tw chu.tw/~wswu

Development of an Online Adaptive Vocabulary Test System. by Wen-shuenn Wu Chung Hua University (CHU) wswu@chu.edu.tw http://www.chu.edu.tw/~wswu. The status quo of General English at CHU. Online English linear placement test was first used in September, 2001. Advantages : fast

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by Wen-shuenn Wu Chung Hua University (CHU) wswu@chu.tw chu.tw/~wswu

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  1. Development of an Online Adaptive Vocabulary Test System by Wen-shuenn Wu Chung Hua University (CHU) wswu@chu.edu.tw http://www.chu.edu.tw/~wswu

  2. The status quo of General English at CHU • Online English linear placement test was first used in September, 2001. • Advantages: • fast • technical support • Disadvantages: • expensive • no control on questions CAN $7 one person one time 1,500 students x CAN$ 7 x 3 = CAN$ 31,500

  3. Original ideas (1) • CAT (computer adaptive test) • Each examinee’s first item is usually of a projective medium-difficulty level for the test population. (Patricia A. Dunkel, 1999) • Get a correct answer  more difficult one • Miss a correct answer  easier one

  4. Original ideas (2) 15 minutes +3 items in a row 15 minutes Level 5 +3 items in a row 15 minutes Level 4 Level 3 Level 2 -3 items in a row Level 1 -3 items in a row 15 minutes 15 minutes

  5. Online Adaptive Vocabulary Test System (OAVTS) • the first stage of a web-based adaptive English placement test system • vocabulary  grammar / sentence structure  listening  reading comprehension

  6. Classification of word list • Collins COBUILD English Dictionary for Advanced Learners (2001): frequency bands (◆◆◆◆◆ ◆) • Macmillan English Dictionary for Advanced Learners of American English (2002): the most frequent words in English (★★★ ★) • Longman Dictionary of Contemporary English (red entry)

  7. Levels of Word List (1) • Level 0: • basic and the most frequently used words (e.g. and, I, my, the, etc.) • Level 1: • Collin COBUILD English Dictionary frequency band 5◆◆◆◆◆ and frequency band 4◆◆◆◆

  8. Levels of Word List (2) • Level 2: • Longman DictionaryW1, S1, W2, S2, W3, S3 • Level 3: • (A) Collin COBUILD English Dictionary frequency band 3◆◆◆ • (B) Macmillan English Dictionary★★

  9. Levels of Word List (3) • Level 4: • (A) Macmillan English Dictionary★ • (B) Collin COBUILD English Dictionaryfrequency band 2◆◆ • Level 5: • Collin COBUILD English Dictionaryfrequency band 1◆

  10. Numbers of Word List Altogether: 28,986 words

  11. V1262022N000001 Code 1: Type V: vocabulary G: grammar L: listening R: reading Definition of item code Code 8: part of speech 1: verb 2: noun 3: adjective 4: adverb 5: phrase 6: idiom Code 5: Specification 1: recognition 2: collocation 3: context clue 4: synonymous clue 5: spelling 6: unclassified Code 6~7: Category 1: general 2: business 3: science 4: medicine 5: law Code 9: N Code 10~15: serial number 000001~999999 Code 2~4: Level -3 <= b <= +3 b: difficulty parameter code 2: 1(+); 0(-)

  12. Test-stopping rules • An adaptive test terminates when one or more of the following stopping rules is met: (Wainer, 1990) (A) when a target measurement precision level has been attained (B) when a pre-selected number of items has been given (C) when a predetermined amount of time has elapsed

  13. Interdisciplinary study of IRT-based Online Adaptive English Test

  14. Demo http://140.126.126.40/englishExamAdmin/

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