A Group of 100 Students Is Randomly Chosen and Divided

question 52

Multiple Choice

A group of 100 students is randomly chosen and divided into two groups. One group is taught typing using a set of new materials and the other using traditional methods. After instruction, typing speeds are compared to determine if the new materials improve learning. This type of study is a(n) :

• A) comparative experiment.
• B) observational study.
• C) prospective study.
• D) retrospective study.

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Definitions:

Glial Cells

Supportive cells in the central nervous system that do not produce electrical impulses but perform functions such as nutrient support, waste cleanup, and myelin formation around neurons.

Histamine

A compound involved in local immune responses, functioning as a neurotransmitter and playing a role in regulating physiological function in the gut and acting as a mediator of itching.

Arousal

A state of heightened physiological and psychological activity, involving the brain, various bodily systems, and behavior.

Asthma

A chronic inflammatory disease of the airways characterized by variable and recurring symptoms, reversible airflow obstruction, and bronchospasm.