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A difficult birth or a history of mental illness in a parent may put a baby at greater risk for autism. The Centers for Disease Control and Prevention said that in a study of 698 Danish children with the developmental disorder, researchers found a disproportionately high number had been born before the 35th week of pregnancy, had suffered from low birth weights and were in a breech position at birth. The children, all of whom were born after 1972 and diagnosed with autism before 2000, also were more likely to have a parent who had been diagnosed with schizophrenia-like psychosis before the autism was discovered.
-Which of the following applies to this study?
A) Randomization
B) Placebo Control
C) Blinding
D) None of the above

Question

Quizplus · Accepted Answer

The study described does not mention the use of randomization, placebo control, or blinding, which are specific methodologies used in experimental research to reduce bias. Instead, it appears to be observational research examining associations between certain risk factors and autism.

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