In a study of acupuncture for treating pain 100 patients were recruited. Half were randomly assigned to receive acupuncture and the other half to receive a sham acupuncture treatment. The patients were followed for 6 months and the degree of pain relief measured. The patients did not know which treatment they actually received, but the treating physicians were aware of who was getting acupuncture and who wasn't. Which of the following does not apply to this study?
a. Randomized Experiment
b. Retrospective Study
c. Placebo Control
d. Single Blind
Question 2
A researcher randomly sampled 100 students at a university and asked them if they regularly take vitamins. He also asked them how many colds they had in the last six months. He then compared the number of colds experienced by those who take vitamins to the number of colds experienced by those who don't take vitamins. What type of study is this?
a. Observational study
b. Case control study
c. Matched pairs study
d. Randomized experiment
Flipper tags have been extensively used in the study of penguin population dynamics.
Areas of Referred Pain, Anterior View
McBurney’s point is the common location of pain in children and adolescents with appendicitis.
Eugène Delacroix, Study for The Death of Sardanapalus.
Half-life formula
Study egocentrism in children