What percentage of Americans over 85 is impaired enough in their activities of daily living (ADL) capacities to be institutionalized in a nursing home or other facility?

Which of the following sleep phenomena could be detected without the aid of an EEG machine?

a. Stage 2 sleep b. REM sleep c. Stage 3 sleep d. sleep spindles

An analysis of item alternatives for a multiple-choice test can yield information about

A. which items are in need of revision. B. testtaker response patterns. C. the effectiveness of distracter choices. D. All of these