English, Article edition: SBROWNI: Stata module to calculate Spearman-Brown reliability correction for test length Herve M. Caci

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  • code
Language
  • English

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Title
  • SBROWNI: Stata module to calculate Spearman-Brown reliability correction for test length
Author
  • Herve M. Caci
Physical Description
  • code
Notes
  • The reliability of a test (Cronbach's alpha or Kuder-Richardson's coefficient in case of dichotomous items) is dependent of the number of items. This immediate command comes in two forms: (1) If the reliability is known for a test (#rel0) with any particular number of items (#count0), the Spearman-Brown formula can be used to estimate how much the reliability would increase if the number of items were increased to #count1; and (2) The converted formula can be used to estimate the number of items required to obtain a particular reliability (#rel1).
  • RePEc:boc:bocode:s351002
Language
  • English
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