
Part 1E: Human Studies (continued) Well, we are nearing the end of the discussion about Scientific Studies. For a prelude to todayâs blog, refer to my blogs beginning with The Devil's Advocate: Which Way is Right?. Last time, we discussed the subtypes of Observational Human Studies: Case-Control and Cohort. Today we will discuss the second main type which is where things get really interesting! 2) Clinical Trials-- also called Experimental or Treatment Studies in which participants may be grouped by chance (random) or deliberately (controlled) while an intervention is introduced ...