You Conduct a Study That Examines the Role of Exercise

question 47

Multiple Choice

You conduct a study that examines the role of exercise on depression alleviation.You assign the first 50 people who are motivated to sign up to the experimental group,and the second group of 50 people,who sign up much later,to the control group.After one month,you find that the experimental group (who exercised three times a week on average) is significantly less depressed than the control group (who exercised one time a week on average) .Although you may be tempted to conclude that exercise helps stave off depression,you cannot because of a lack of ____ in your study.

• A)random sampling
• B)random assignment
• C)random surveying
• D)objectivity

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Definitions:

Osteoarthritis

A degenerative joint disease characterized by the breakdown of cartilage and underlying bone, leading to pain and stiffness, especially in the hips, knees, and thumbs.

Joint

A point at which two bones connect in the body, facilitating movement and support, or a term indicating collective or combined effort in various contexts.

Altered Neurogenesis

Changes in the process by which neurons are generated from neural stem cells and progenitor cells, which can affect brain function and structure.

Hippocampus

A region of the brain that is associated with memory formation and spatial navigation.