Which term describes the degree to which two or more scores vary together?

Which term describes the degree to which two or more scores vary together?

• A. Correlation
• B. Reliability
• C. Validity
• D. Standard Deviation

Answer: (A)

Correlation describes the degree to which two or more scores vary together. It captures the pattern of how changes in one variable are related to changes in another—positive (both tend to increase together), negative (one increases while the other decreases), or no clear pattern. The correlation coefficient, ranging from -1 to 1, indicates both the strength and direction of that relationship. This concept is different from reliability (consistency of a measure), validity (whether the measure assesses what it’s supposed to), and standard deviation (the spread of scores for a single variable).

Correlation describes the degree to which two or more scores vary together. It captures the pattern of how changes in one variable are related to changes in another—positive (both tend to increase together), negative (one increases while the other decreases), or no clear pattern. The correlation coefficient, ranging from -1 to 1, indicates both the strength and direction of that relationship. This concept is different from reliability (consistency of a measure), validity (whether the measure assesses what it’s supposed to), and standard deviation (the spread of scores for a single variable).