According to research studies, a short-term benefit to infants of breastfeeding is
a. fatter babies.
b. a higher rate of acute otitis media.
c. a lower ratio of muscle to fat by the end of the first year.
d. fewer allergic reactions.
Answer: d. fewer allergic reactions.
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The visible spectrum refers to the
a. portion of the whole spectrum of light that is visible to the human eye. b. effect of intensity on how we see dark to grey to white. c. effect of the sound density on the perceptions of those with synesthesia. d. well-known fact that colors are less visible to some men's eyes. e. radiation waves that fall between 20 and 20,000 hz.
Dr. Abromowitz has done a study looking at the correlation between depression in children and
amount of television they watched. He finds what seems to be a strong, positive correlation between the two. He decides that watching too much T.V. causes children to become depressed. However, he has a third variable problem. Which of the following is an example of a third variable problem? A) Parental depression is strongly correlated with both children's depression and the amount of T.V. a child watches. B) Being depressed causes a child to watch too much T.V. C) Making any conclusions about connections between only two variables. D) Thinking there is a connection between variables when there is none.