When to use Scott’s π or Krippendorff's α, if ever?

Xinshu Zhao

Research output: Contribution to conferencePaper

Abstract

Scott’s π (1955) and Krippendorff's α (1980) have been among the most-often used or recommended general indicators of reliability. This article presents paradoxes showing that neither can be a general indicator. We show that π or α should be used only when (a) coders enforce a predetermined quota as the first priority and (b) coders maximize chance coding as the second priority. Because the two conditions rarely hold, π or α should rarely be used.

Original languageEnglish
Publication statusSubmitted - Aug 2011
EventAssociation for Education in Journalism and Mass Communication (AEJMC) 2011 Annual Conference - St. Louis, United States
Duration: 10 Aug 201113 Aug 2011

Conference

ConferenceAssociation for Education in Journalism and Mass Communication (AEJMC) 2011 Annual Conference
Period10/08/1113/08/11

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