Which of the following is true about the original research that outlined a causal relationship between vaccines and autism?
A. The original sample was representative of the greater population.
B. Participants were randomly assigned to control and experimental groups.
C. The researchers were “blind” to the study and its intent.
D. The original study had a very small sample size.
Answer:D
Which of the following is true about the original research that outlined a causal relationship between vaccines and autism?
A. The original sample was representative of the greater population. B. Participants were randomly assigned to control and experimental groups. C. The researchers were “blind” to the study and its intent. D. The original study had a very small sample size.