Thursday, April 23, 2009

Dominance approach vs. ideal-point approach in item selection

Dominance approach (Coombs, 1964; Likert, 1932)
  • It is about measuring people's ability
  • It uses items of high internal consistency.
  • Therefore, if a person scores low on one item, he/she should be score low on the total scores as well. Likewise, if I score higher on the item than you do, my ability would be dominant over your ability.
  • In IRT terminology, DIF (Differential Item Functioning) refers to "a difference in the probability of endorsing an item for members of a reference group (e.g., US workers) and a focal group (e.g., Chinese workers) having the same standing on the latent attribute measured by a test." It is related to dominance approach.
Ideal-point approach (Thurstone, 1928)
  • It is about measuring people's attitude
  • Individuals will endorse an item to the degree that it reflects
  • More neutral items should be included

41 comments:

  1. 要保持更新呦,加油!!!期待你的新文章!!! ........................................

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  2. 外表往往與事實本身不符,世人卻容易被表面裝飾所欺騙了 ..................................................

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  3. 幽默並不是諷刺,它或許帶有溫和的嘲諷,卻不傷人,它可能是以別人,也可以用自己為對象。..................................................

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  4. 友情像一棵樹木,要慢慢的栽培,才能成長真的友誼,要經過困難考驗,才可友誼永固........................................

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  5. 生存乃是不斷地在內心與靈魂交戰;寫作是坐著審判自己。......................................................................

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  6. 當一個人內心能容納兩樣相互衝突的東西,這個人便開始變得有價值了。............................................................

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  7. 向著星球長驅直進的人,反比踟躕在峽路上的人,更容易達到目的。............................................................

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  8. 做好事,不需要給人知道,雖然只是一件微不足道的事,但我相信,這會帶給我快樂。..................................................

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  9. 聰明人之所以不會成功,是因為他們缺乏了堅忍的毅力。..................................................

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  10. 很喜歡你的部落格,來給你加油,幫你推一下喔~期待你的下一個更新,謝謝.................................[/url]...............

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  11. 偶爾上來逛逛,下次不知是否還有緣再進來,先祝您平安順利!!!..............................................................

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  12. 一個人的價值,應該看他貢獻了什麼,而不是他取得了什麼......................................... ........................

    ReplyDelete