A Researcher Wishes to Study the Relationship Between the Level

question 42

Multiple Choice

A researcher wishes to study the relationship between the level of background noise and mental concentration. The treatment (noise level) will have three levels: no noise, low-intensity noise, and high-intensity noise. the subjects are to be divided into three groups, and each group is to receive one of the treatments. He has available to him a set of 60 female volunteers and a set of 90 male volunteers. What experimental design strategy would help him eliminate the introduction of gender as a confounding variable? ​

• A)stratified sampling
• B)replication
• C)blocking
• D)systematic sampling
• E)double-blind trials

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Definitions:

Paradoxical Sleep

Another term for REM (Rapid Eye Movement) sleep, characterized by active brain patterns similar to wakefulness but the individual is asleep and dreaming.

Sleep Apnea

Sleep apnea is a sleep disorder characterized by pauses in breathing or periods of shallow breathing during sleep, often resulting in disrupted sleep and decreased oxygen levels in the blood.

Freudian

Relating to or influenced by the theories of Sigmund Freud, especially those concerning the unconscious mind, psychosexual stages, and defense mechanisms.

Memory Consolidation

The process by which short-term memories are transformed into long-term memories, making them more stable and durable over time.