| Abstract
Selfitis—which started off as a hoax but has now been investigated empirically—has been
defined as the obsessive–compulsive desire to take photos of oneself and post them on social
media. Furthermore, a scale to assess selfitis, the Selfitis Behavior Scale (SBS), has been
developed. This study applied advanced psychometric testing methods, including confirmatory
factor analysis (utilizing classical test theory) and the Rasch model (utilizing modern test
theory), to examine the psychometric properties among Persian speakers (in Iran and Afghanistan). The participants (3163 Iranians and 1100 Afghanistani) completed an online survey
posted on Instagram pages. The SBS showed promising properties, including satisfactory
reliability (e.g., internal consistency and test–retest reliability), excellent construct validity
(e.g., good fit in the CFA and Rasch models), and acceptable measurement invariance across
Iranian and Afghan samples. Consequently, the SBS is a valid and reliable instrument for
assessing selfitis among Persian-speaking samples. |