Revise your thinking.
1. Single blind gives the control group a placebo — a substance that is inert, it has no physical effect. Subjects don't know if they are in experimental or control group to reduce placebo effect, a change in behavior solely due to believing that you are getting the independent variable.
2. Double blind keeps both subjects and experimenter ignorant of group setup. Distribution of the independent variable and placebo are controlled by third party. This controls for experimenter bias and self-fulfilling prophecy, which means that experimenters with particular expectations are likely to consciously or unconsciously to bias the experiment and influence it to conform to their expectations.
There are two main classes of individuals who can affect the outcome of an experiment:
Those who could influence the results
Those who evaluate the results
When all the individuals in either one of these classes are blinded, an experiment is said to be:
A) Single blind (I'm thinking this?)
B) Double blind
C) not blinded
D) biased
1 answer
1 answer