According to a recent study by De Meyer and others, every one of the older adults with mild cognitive impairment who had ________ in their spinal fluid developed Alzheimer disease within 5 years.

Night terrors:

a. typically occur during REM sleep. b. usually occur during the first few hours after falling asleep. c. are nightmares that occur only in children. d. are often accompanied by the temporary cessation of breathing. e. are vividly recalled the next morning.

If Tom and Rachel have a joint focus of attention, it means that they are

A) both looking in the same direction. B) attending to different aspects of the same object or event. C) both paying attention to each other. D) focusing their attention on the same object or event.