Author Question: A researcher has observed that children who eat more sugar tend to show a higher level of activity ... (Read 130 times)

deesands · **on:** Jun 19, 2018

A researcher has observed that children who eat more sugar tend to show a higher level of activity than children who eat less sugar. However, the researcher suspects that the apparent relationship may be explained by the fact that some children have a higher rate of metabolism, which causes them to eat more and to be more active compared to children with a lower rate of metabolism who eat less and are less active. This is an example of the ____.

a. directionality problem
b. third-variable problem
c. extraneous variable problem
d. manipulation check problem

Question 2

Following a natural disaster, interviewers seek out typical victims to ask them about their experiences. In doing so, they are seeking a(n) ____ sample.

a. convenience
b. purposive
c. modal instance
d. expert