Virtually all researchers agree that parents can lessen older babies' need to cry by
A) providing a multitude of engaging activities for them.
B) surrounding them with a variety of visually stimulating toys.
C) encouraging more mature ways of expressing their desires.
D) placing them in group child care in early infancy.
C
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Which of the following is true of the spinal nerves?
a. The cell bodies of efferent axons lie in the spinal cord gray matter. b. Incoming sensory signals arrive via the ventral roots of the spinal cord. c. Outgoing motor signals travel via the dorsal roots of the spinal cord. d. The cell bodies of efferent axons lie in the spinal cord white matter. e. The cell bodies of outgoing motor neurons reside in the dorsal root ganglia.
The purpose of the control group is to
a. make the experiment more complex. b. isolate the effect of the independent variable on the dependent variable. c. make statistical significance more likely. d. isolate the effect of the dependent variable on the independent variable.