The reliability of a two-item scale: Pearson, Cronbach, or Spearman-Brown? Golden trophy for IJPH paper!

We were happy to be informed that a recent IJPH paper has been identified as a “highly cited paper ” in “Essential Science Indicators” in Web of Science, which resulted in the award of a golden trophy (virtual, I presume!)

The paper is called “The reliability of a two-item scale: Pearson, Cronbach, or Spearman-Brown” and belongs to our Hints and Kinks* section. The paper aims to clear the confusion regarding which is the most appropriate reliability indicator for 2-item scales: the most frequently used Cronbach’s alpha coefficient or -as suggested by others- Pearson or Spearman-Brown?

We would like to congratulate the authors Rob Eisinga, Manfred te Grotenhuisand Ben Pelzer from Radboud University in the Netherlands!

We welcome any comments on this paper and/or your submissions to our Hints and Kinks section (see below for details)


*Hints and Kinks are short methodological reports (1000 words max., no abstract) presenting topics relevant in survey research and surveillance. They report on experiences with techniques in a variety of areas and topics, such as writing questions, questionnaire design, survey implementation, or new and original ways to show results.

View the latest posts on the International Journal of Public Health homepage


By commenting, you’re agreeing to follow our community guidelines.

Your email address will not be published. Required fields are marked *