You'll want to think about something you're interested in reading about.
Surveys often focus on people's beliefs and attitudes about social and political phenomenon. These could include opinions about the economy, politicians, social media, etc
Observational often explore behaviors and lifestyles. These could include smoking by a specific group such as teenagers
Experimental studies are like observational but the researchers are conducting 'experiments', meaning they're manipulating a variable (such how much social media middle age men consume)
Survey Or Questionnaire OR Poll OR Scale OR "Research instrument" OR Attitudes OR Perceptions OR "public opinion"
observational OR cohort OR prospective OR retrospective OR case report OR case-control OR cross-sectional OR longitudinal
Clinical trial OR cross-over OR intervention study OR experimental study OR comparative study OR trial
