Jeff and franco are both involved in a sleep study. jeff wakes up screaming early in the night. the researchers notice that although his eyes are open, he doesn't seem to be totally awake. additionally, recordings show jeff's heart rate and breathing are very high. franco wakes up much later in the sleep period because he was frightened by the content of his dream. he was able to report to the researcher a very vivid account of the dream upon waking. jeff likely experienced a whereas franco experienced a

sleep terror; nightmare

Explanation:

Even though they have strong similarities (Dreams that are perceive as 'scary' or uncomfortable) there are some distinct differences between the two.

- Nightmare occurs during REM while sleep terror occurs between cycles.

- Between the two, sleep terror tend to be accompanied by physical response such as screaming or other violent movements.

- Nightmare tend to be remembered by the receiver for a long period of time, while sleep terror tend to be dissapear from the receiver's recollection when they woke up.

answer; the best answer is (demand);

answer; /// i do believe the correct answer is ( a