What is the common purpose of using the double blinding and deception techniques?
a. they are more economical and easier to use than randomization or matching
b. they keep participants' perceptions of the experiment constant across different conditions of the experiment
c. they eliminate the effects of most known extraneous variables
d. they eliminate experimenter bias
Question 2
Which of the following best describes a hypothesis?
a) statement that you set out to prove
b) tested by collecting only the data that support it
c) proposed before a good research question can be developed
d) posits a clear relationship between different factors
