The Glenohumeral Joint That Articulates the Humerus to the Pectoral

question 30

Multiple Choice

The glenohumeral joint that articulates the humerus to the pectoral girdle is a highly mobile joint. This mobility comes at a cost because _________.

• A) the blood vessels that lead to the arm and hand can easily be cut off by the free range of motion
• B) these type of joints are harder to control and coordinate
• C) the joint is relatively unstable and can easily dislocate
• D) muscles that span this mobile joint will only provide a reduced amount of power

Identify the importance of replication and other research methods in psychology.

Recognize the role of control in experiments.

Appreciate the relationship between psychological variables, such as the correlation between physical height and popularity.

Understand the risks and benefits of various research methods.

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Definitions:

Dependent Variable

In research, it's the variable that is tested and measured, often to see the effects of variations in the independent variable.

Researcher's Manipulation

The deliberate alteration of variables by a researcher in an experiment to determine cause and effect relationships.

Independent Variable

A variable that is manipulated or changed in an experiment to determine its effect on a dependent variable.

Dependent Variable

In an experimental setting, the variable that is being tested and measured, which is expected to change as a result of manipulations in the independent variable.