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Your Turn

Perform a test of internal consistency using both omega and alpha on the SWLS scale at time 2.

Does the scale have good internal consistency at time 2, as well?

Learn More

Read more about the omega() and alpha() functions in the psych package.

The Personality Project also has a great tutorial on Using R and the psych package to find omega.

Interested in learning more about why it may be preferential to use omega instead of alpha? Check out the article "Thanks coefficient alpha, we'll take it from here " by McNeish (2018). Use this link to download the unformatted open access version of the article.

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Maria Cristina Limlingan

Maria Cristina Limlingan

January 14, 2022

Thanks for sharing about omega - this is good information to know. I'm wondering if you suggestions about how to do inter rater reliability between two people in R? (e.g. 2 people doing an observation and want to find out if they are coding similarly)