The Facebook Intensity Scale (FBI; Ellison, Steinfield, & Lampe, 2007) measures the intensity and frequency of Facebook use. It contains eight items (e.g., Facebook is part of my everyday activity or I would be sorry if Facebook shut down). The Polish version of the scale in the present study had Cronbach's a of .84. FBI combines two aspects of Facebook intensity and engagement in Facebook: the number of Facebook friends and the amount time spent on Facebook