試題反應理論 (item response theory)
DESCRIPTION
試題反應理論 (Item Response Theory). Helen Ou 2007 12.28 at Psy Test Course. 課程主題. 10 月 24 日 ( 三 ) 心理測驗編製與基本統計 11 月 28 日 ( 三 ) 古典測驗理論 — 信度理論 12 月 26 日 ( 三 ) 試題反應理論. 複習上次課程. 真實分數模式. 真實分數的存在並不受測量次數的影響，它代表長期測量結果「不變」的部份。而實際上，單獨一次測量所得的實得分數， - PowerPoint PPT PresentationTRANSCRIPT
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(Item Response Theory)Helen Ou 2007 12.28 at Psy Test Course
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1024() 1128() 1226()
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random error scoreerror
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Cronbach i= S2i= S2x= =
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Standard error of measurement^
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1. A,B,CA,B,C
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(P) (percentage passing) R=n=
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(item discrimination) D PH=33%PL=33%
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(P=.8D=.32)1000.6(A) (B)(C) (D)
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(P=.67D=.45)(P.60P.71) (A) (B) (C) (D)
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()(parallel forms)
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(item response theory, IRT) ,(latent traits)(abilities)(monotonicallyincreasing)(item characteristiccureICC)
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(L-)(p)p=.001.Probability
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(H-)(p)p=.999.Probability H-X
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p=.900.XXL-H-
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Easy itemDifficult item
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b [beta] a [afa] c i=1..nnJe2.718 D=1.702j j pi() Jiipi()S01(item response theory; IRT)
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sb0.5
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SaS
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c
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IRT (unidimensionality) : (local independence): --(know--correct assumption)
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(item information function;IIF),(IIC) (Lord1980) (IIC)
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(item information function)
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1234561.001.001.00-1.50-0.500.501.800.801.801.801.200.400.000.000.250.000.100.15
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IRTCTTIRT
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IRT
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IRTIRT()60IRT
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SEM = SD x 40 0.85 Kelley ( Brennan , 1989) 3 7.75( 99.99% )62( 7.75*4*2 ) 1-60
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60 300
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IRT IRT IRT
item parameter
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(IRT) (IRT) (IRT)
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()20 80
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-The objectives of this strategic goal are to 1) to provide VA researchers a means of receiving expert assistance on the website, and 2) maintain a comprehensive customer outreach database. These objectives are the same as they were last year and under MEI.-The objectives of this strategic goal are to 1) to provide VA researchers a means of receiving expert assistance on the website, and 2) maintain a comprehensive customer outreach database. These objectives are the same as they were last year and under MEI.-The objectives of this strategic goal are to 1) to provide VA researchers a means of receiving expert assistance on the website, and 2) maintain a comprehensive customer outreach database. These objectives are the same as they were last year and under MEI.