Notas metodológicas

Published on 23 de enero de 2024 | http://doi.org/10.5867/medwave.2024.01.2746

Validation of questionnaires for the measurement of health variables: Fundamental concepts

Back to article Figure 1

Cronbach’s α formula for determining intra-test reliability.

α: Cronbach’s alpha.
κ: Number of questions or items considered.
σYi2: Item variance.
σx2: Variance of observed values.
Source: Prepared by the authors of this study based on the following source [4].