The 5-item version of Collective Narcissism Scale has been used in different cultural and national contexts and has persistently shown excellent concurrent and predictive validity (Golec de Zavala, Dyduch-Hazar, & Lantos, 2019). We aimed at shortening the scale from five to three items by conducting IRT analyses on Polish, German and Turkish sample. 

Suggested items for the ultra-short version of Collective Narcissism Scale

1. 1. My group deserves special treatment.
2. 2. Not many people seem to fully understand the importance of my group.
3. 3. I will ever be satisfied until my group gets the recognition it deserves. 

The complete analysis following item response theory approach are reported here.