Attempting to do a study with three main variables: 1. Mobile Phone use/addiction (ind.); 2. Happiness (dep.); 3. GPA (dep.). I have used the MPPUS-27 for in-class exercises. But I have read that it is a bit dated. I have used the OHQ, but again only in-class. Now, as I design the research - I would ideally like to have two surveys that rely on a similar scale. MPPUS-27 is using a 10 point-scale. And OHQ is using 6. The GPA is not an issue. Also, can Survey Monkey be designed and used to deploy such questionnaires with Likert scales? Haven't used the survey method in some time. Appreciate the feedback.