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This calculator estimates composite reliability as:
Whereby, λ (lambda) is the standardized factor loading for item i and ε is the respective error variance for item i. The error variance (ε) is estimated based on the value of the standardized loading (λ) as:
The item r-square value is the percent of the variance of item i, explained by the latent variable. It is estimated based on the value of the standardized loading (λ) as:
1. Enter the standardized loading for the first item.
2. Click “add item” and continue to enter the standardized loading for each item.
3. To remove any item, click “delete”.
4. To reset the form, click “reset”.
Raykov, Tenko. (1997). Estimation of composite reliability for congeneric measures. Applied Psychological Measurement, 21(2), 173-184.
Colwell, Scott R. (2016). The composite reliability calculator. Technical Report, DOI: 10.13140/RG.2.1.4298.088.