The most common visual impairment in late adulthood is macular degeneration.

According to the research on implicit memory and explicit memory,

a. people with amnesia typically perform better on explicit memory tasks than on implicit memory tasks. b. when the tests are conducted properly, most people with normal memory reveal very little implicit memory. c. on implicit memory tasks, people recall much more when they have used deep levels of processing, rather than shallow levels. d. psychologists sometimes discover a dissociation; for example, a variable may have a large effect on an explicit task, but a small effect on an implicit task.

Which of the following does not increase the probability of fusion of two tone sequences?

a. Increasing the alternation rate b. Switching to the other ear c. Increasing the frequency difference between the tones d. Increasing the difference in sound level between the tones