Identify each of the statements as true or false. Use T to indicate true and F t
ID: 3056405 • Letter: I
Question
Identify each of the statements as true or false. Use T to indicate true and F to indicate false.
A) Randomized comparative experiments are less likely to demonstrate causality than observational studies.
B) Double blinding is when the subject does not know who is in the treatment group or whether they are given a placebo.
C) Giving a placebo decreases the impact of the placebo effect on the experiment by giving everyone the perception of treatment.
D) Lurking variables may distort results in an observational study.
Explanation / Answer
A) F - { if you randomize classrooms instead of students (but your unit of analysis is student) you still have an experiment but it's less than pure due to the clustering within classroom}
B) T - {double-blind study is one in which neither the participants nor the experimenters know who is receiving a particular treatment}
C) F - {The placebo effect is related to the perceptions and expectations of the patient; if the substance is viewed as helpful, it can heal, but, if it is viewed as harmful, it can cause negative effects}
D) T - { lurking variable is a characteristic of each 'individual' that is either unrecorded or unused in the analysis, but that distorts the apparent relationship between two variables, X and Y.}