Variance of means versus mean of variances: A contrarian view on operationalizing group dispersion

Hock Peng Sin, Daniel A Newman

Research output: Contribution to conferencePaperpeer-review

Abstract

Common practice in calculating within-group dispersion (VARwg and SDwg) and within-group agreement (rwg) includes first estimating within-group variance at the item level, then averaging across item-level variances. Using classical test theory, we illustrate problems with the common approach. Estimating dispersion and agreement via scale scores is recommended, and implications of item-specific and raterspecific variance for indexing substantive dispersion constructs are discussed.

Original languageEnglish (US)
StatePublished - Dec 1 2005
Externally publishedYes
Event65th Annual Meeting of the Academy of Management, AOM 2005 - Honolulu, HI, United States
Duration: Aug 5 2005Aug 10 2005

Other

Other65th Annual Meeting of the Academy of Management, AOM 2005
CountryUnited States
CityHonolulu, HI
Period8/5/058/10/05

Keywords

  • Within-group agreement
  • Within-group dispersion
  • Within-group variance

ASJC Scopus subject areas

  • Information Systems and Management

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