Author Question: In randomized controlled trials, researchers assign participants to treatment or control groups ... (Read 308 times)

craiczarry · **on:** Jun 21, 2018

In randomized controlled trials, researchers assign participants to treatment or control groups randomly. What is the best definition of random as it applies to this?

A) Group assignment is haphazard and not systematic.
B) Participants are unaware of their group assignment.
C) Researchers are unaware of the group assignments
D) Everyone has an equal chance in group assignment.

Question 2

Natural experiments in epidemiology are most similar to what kind of psychology study?

A) Experimental
B) Ex post facto
C) Correlational
D) Observational