Fig. 2. Motivations for using social networking sites. Smith, Aaron. From “Why Americans Use Social Media.” Pew Research Center, 15 Nov. 2011, www.pewinternet.org/2011/11/15/why-americans-use-social-media/.
“Social Media Use by Age Group Over Time,” Pew Research Center, Washington, DC (January, 2014)
http://www.pewinternet.org/data-trend/sociaI-media/sociaI-media-use-by-age-group/.