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Question
A) Provide an informal analysis of the following passage; or
B) in analyzing the passage, do the following:
a. Identify the causal hypothesis at issue.
b. Identify what kind of study it is.
c. Describe the control and experimental groups.
d. State the difference in effect (or cause) between control and experimental groups.
e. Identify any problems in either the study or the report of it, including but not necessarily limited to uncontrolled variables.
f. State the conclusion you think is warranted by the report.
BOSTONAP, UPI reports (adapted). The constant bright lights of hospital nurseries, often two to four times as bright as normal office lighting, may contribute to the blinding of hundreds of premature babies each year, a recent study warns. Doctors kept track of the incidence of retinopathy, a disease of the retina, in two groups of premature babies. One group was kept in incubators covered with acetate that reduced the amount of light by 58 percent. The rest stayed in ordinary incubators. Among the smallest babies, the researchers found that twenty-one of thirty-nine (54 percent) in shielded incubators developed retinopathy, compared with eighteen of twenty-one (86 percent) of those exposed to the bright lights. Dr. Penny Glass, a developmental psychologist at Childrens Hospital National Medical Center and Georgetown University Medical Center, who directed the study, recommends that the light levels in hospital nurseries be brought down. "I feel that the increase in light levels has not been demonstrated safe," she said.
Answer
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