As your authors note, processing speed improve significantly between childhood and adolescence. Which of the following physical factors helps explain some of this change?
a. An increase in myelination during adolescence allows nerve impulses to travel more rapidly, and this allows for faster and more efficient processing of information.
b. The growth of the amygdalae and hippocampi are both maximized in early adolescence, which enhances the speed of data processing.
c. Hemispheric specialization, which refers to the combined manner in which both halves of the brain simultaneously deal with information, does not begin until puberty.
d. A thickening of the corpus callosum occurs during puberty, and this allows for neural impulses to be sent simultaneously to all four lobes of the cerebrum. This, in turn, drastically enhances processing speed.
a
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George has gone into a deep depression after the death of his wife, for whom he had provided daily care for over 2 years after her first stroke. What role might cortisol play?
a. ?Over-response of the hippocampus may have led to reduced cortisol in the bloodstream, which is associated with depression. b. ?Under-response of the hippocampus may have led to reduced cortisol in the bloodstream, which is associated with depression. c. ?Consistently elevated levels of cortisol due to stress can overwhelm the hippocampus’s feedback loop and lead to excess levels of cortisol in the bloodstream, which is associated with depression. d. ?Erratic levels of cortisol due to stress can disrupt the hippocampus’s feedback loop and lead to erratic levels of cortisol in the bloodstream, which is associated with manic depression.
You and your friend are debating the contributions of Sigmund Freud and the neo-analytic theorists. Your friend says those ideas were sexist, lacked scientific foundation, and were just plain wrong. You say that their ideas are important for several reasons. What are some of the reasons you will use in your debate?
What will be an ideal response?
The variable that is measured to determine the impact of an experimenter's manipulation is called the __________ variable.
A. correlative B. dependent C. control D. independent
What is the mode of these data: 2, 4, 5, 4, 4, 1, 1?
a. 3 b. 4 c. 5 d. 7 e. these data have no mode