Coefficient alpha and reliability of communication science measurement scales: A note on Hayes and Coutts

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

This note intends to complement the recent discussion in Hayes and Coutts (2020) by focusing on (i) the loading equality condition for the population identity of coefficient alpha and reliability of multiple-indicator measurement scales, as well as (ii) the potential utility of alpha when this condition is not satisfied. We show that the alpha and reliability coefficients can be very close at the population level in certain cases of loading inequality. In addition, we point out that in any studied population the identity of alpha and scale reliability (coefficient omega) is an improbable event. We discuss implications for communication and behavioral research with large samples, which are becoming increasingly widely used in large-scale and nationally representative studies. Findings of the article are then illustrated using numerical data. We conclude with proposed recommendations for the use of coefficients alpha and omega by communication and behavioral scientists concerned with evaluating scale reliability.

Details

OriginalspracheEnglisch
Seiten (von - bis)205-218
Seitenumfang14
FachzeitschriftCommunication Methods and Measures
Jahrgang18
Ausgabenummer3
Frühes Online-DatumFeb. 2024
PublikationsstatusVeröffentlicht - 2 Juli 2024
Peer-Review-StatusJa

Externe IDs

Scopus 85185459928
ORCID /0000-0003-1106-474X/work/173516471

Schlagworte

ASJC Scopus Sachgebiete

Schlagwörter

  • Coefficient alpha, Multi-item measuring scale, Population, Probability, Scale reliability, multi-item measuring scale, probability, coefficient alpha, scale reliability, population