Shane and Sean are monozygotic siblings being raised by the same parents in the same house, yet they differ on some personality traits. How can this be so?
a. They are influenced and shaped by non-shared environments.
b. They have the same genetic makeup.
c. They are influenced by shared environments.
d. They are trying to be different from each other, but in reality they are not.
Answer: A
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In the United States, most teenagers have cell phones and text. Which of the following MOST accurately describes adult cell phone usage?
A) Most do not have cell phones, so most do not text. B) About half have cell phones, but most of them do not text. C) Most have cell phones, but most of them do not text. D) Most have cell phones, and most of them text.
When the item-total correlation is ____, the slope of the item characteristic curve is
_______. a) negative; positive b) negative; negative c) positive; negative d) positive; zero