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Scenario II A Psychologist Was Interested in the Effects of Sleep Deprivation

question 2

Multiple Choice

Scenario II
A psychologist was interested in the effects of sleep deprivation on performance on a vigilance task. Forty college students served as participants and were placed in either the sleep-deprivation group or the control group by coin flip. Both groups spent the night before the study in a sleep laboratory, but only the control group was allowed to sleep. By the next morning, the sleep-deprived group had been awake for the last 24 hours. At this time, both groups were provided a nutritious breakfast and, shortly thereafter, testing began in sound-attenuating cubicles, each equipped with a computer. The vigilance task consisted of monitoring the computer screen. Participants were instructed that red dots represented allied space crafts and green dots represented enemy space crafts. Throughout the 2-hr hour long task, red dots moved across the screen in irregular patterns. Occasionally and unpredictably, a green dot would quickly move across the screen in a haphazard pattern. When a green dot appeared, the task of the participant was to move a stylus over the green dot and press a button, "destroying" the enemy craft.
The results of this fictitious experiment are shown in Figure 2.2.
Figure 2.2.
-(Scenario II) The independent variable was:

Definitions:

Cercariae

The larval stage of certain parasitic flatworms belonging to the class Trematoda, which is released from the intermediate host and seeks out the definitive host in which it will mature.

Sporocysts

A form of parasitic flatworm larvae that develops within a snail host, part of the life cycle in certain flukes.

Scolexes

The head segments of tapeworms, equipped with suckers or hooks for attaching to the host's intestinal wall.

Tapeworm Infection

a parasitic disease caused by ingesting tapeworm eggs or larvae, leading to the development of tapeworms in the intestines.