Experiments are the way that we confirm that one thing causes another. If the study is not an experiment (or combined experiments in a meta-analysis), then the research does not show cause and effect.
Experiments are one of the strongest types of research.
So…how can you tell a true experiment from other studies? Hazel B can tell you in 4:04 and simple language at https://www.youtube.com/watch?v=x2i-MrwdTqI&index=1&list=PL7A7F67C6B94EB97E
Go for it!
[After watching video: Note that the variable that is controlled by the researcher is call the Independent variable or Cause variable because it creates a change in something else. That something else that changes is the Dependent variable or Outcome variable.]
- Based on the video, can you explain why true experiments are often called randomized controlled trial (RCT)?
- Take a look at The Effect of the Physical and Mental Exercises During Hemodialysis on Fatigue: A Controlled Clinical Trial, that is free in full-text via PubMed. How does it meet the criteria of a true experiment as described by Hazel B in the video?
FOR MORE INFORMATION: Go to “What’s an RCT Anyway?” (https://discoveringyourinnerscientist.wordpress.com/2015/01/23/whats-a-randomized-controlled-trial/ )