To investigate emotional support and illness, nine thousand pregnant women were randomly assigned to one of three groups: group one received supportive telephone calls from a nurse two weeks after giving birth; group
two received supportive telephone calls from a nurse every two weeks for the first three months after giving
birth; and group three received no telephone calls from a nurselafter giving birth. At both six months and twelve
months after giving birth, mothers who received the most telephone calls from nurses had significantly fewer
doctor visits for illnesses than mothers in the other two groups. Which one of the following is true?
It's a negative correlation because more phone calls predicted fewer doctor visits for
illness.
O none of the answers is true
The independent variable is the nurses.
It's a positive correlation because social support and frequency of doctor visits for illness
were related
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