DrAcitelli Studies Sleep and Sleep Disorders

question 14

Multiple Choice

Dr.Acitelli studies sleep and sleep disorders.She is curious as to whether falling asleep in front of a television set causes people to fall asleep more slowly than falling asleep without watching TV.She recruits a sample of 60 middle-aged women from a local church who reported no history of sleep problems.She creates three conditions.All participants come to the sleep lab for three nights in a row and experience all three conditions.In the first condition (A) ,participants fall asleep in front of a television that is off.In the second condition (B) ,participants fall asleep in front of a television that is turned on to the same 24-hour news channel.In the third condition (C) ,participants fall asleep in front of a television that is turned on to the same 24-hour news channel but is muted.With the use of an electroencephalograph (EEG) ,the researcher measures how long it takes participants to fall asleep.

-Dr.Acitelli was concerned that asking participants how long it took them to fall asleep would lead them to suspect that was the purpose of the study.Her decision to measure how long it took participants to go to sleep using the EEG instead of self-report was meant to decrease which of the following?

• A)Order effects
• B)Selection effects
• C)Demand characteristics
• D)Counterbalancing effects

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Definitions:

Leukocyte

A white blood cell, part of the immune system, involved in protecting the body against both infectious disease and foreign invaders.

Lymphocyte

A type of white blood cell that is part of the immune system, helping the body to fight infection and disease.

Neutrophil

A type of white blood cell important in defending the body against infection and disease.

Blood Smear

A laboratory test procedure that involves spreading a thin layer of blood on a microscope slide for the purpose of examining blood cells under a microscope.