2.3. Recruitment and selection

It was a self-selected sample, recruited from various Swedish universities, as well as from a website dealing with positive psychology and via social media channels (Facebook, Twitter). Those who were interested were directed to a web page with information about the study, the app being tested and how to participate. From the web page, the participants were able to fill out an online screening assessment, which was necessary to be completed in order to be included in the study. Except from provision of the Iphone app, no inducement for participation was offered.