When shown a picture of a spoon, Alfred says, "foon, hoon, poon.". Alfred's mispronunciation would be classified as a(n)
a. expressive aphasia.
b. fluent aphasia.
c. receptive aphasia.
d. primary agnosia.
A
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If one extrapolated an age trend mentioned in the textbook, one would estimate the risk of Alzheimer’s disease at age 80 as ______.
A. 40% B. 50% C. 70% D. 80%
Research on sex hormones suggests that ________
a. fluctuating levels of progesterone make women emotional before menstruation. b. the testes are the only site for the production of androgens. c. estrogen enhances learning and memory. d. estrogen and progesterone are produced only by females.
One study had participants view tapes of dental surgery after studying a word list. This study concluded that:
a. emotional videos have no effect on memory. b. emotional videos can enhance memory, but only for material related to the video itself. c. emotional videos can enhance memory even for unrelated material. d. emotional videos can enhance memory for related material, while reducing memory for unrelated material.
One explanation for new species is that they emerge when two populations from an original species become geographically separate. With respect to this explanation, contemporary research has shown that
a. geographically isolating a species brings about its extinction. b. it is not possible to geographically isolate members of a species from one another. c. there are many examples of new species that have emerged without geographic isolation. d. new species never have ancestors in common with original species.