Question

If a test measures a single construct, then its component items will be internally consistent. This characteristic of test is known as _________.

• A. Test fallacy
• B. Test dominance
• C. Test homogeneity
• D. Test validity

Hint:

Remember that test homogeneity and internal consistency are closely related psychometric concepts that indicate all items on a scale are pulling in the same direction to measure one single variable.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks us to identify the psychometric property that describes a test whose items are highly internally consistent and measure a single underlying construct.

Step 2: Detailed Explanation:

• When all items on a psychological test measure the same single construct, the test is said to be unidimensional or homogeneous.

• Test homogeneity refers to the degree to which the individual items on a test are intercorrelated and measure a single, unified psychological trait or construct.

• High internal consistency (often measured using Cronbach's alpha) is a direct statistical indicator of test homogeneity.

• Test fallacy is not a recognized psychometric term.

• Test dominance is not a standard property related to internal item consistency.

• Test validity refers to whether a test measures what it claims to measure, which is a broader concept that includes external relationships and content coverage, rather than just internal item consistency.

• Therefore, a test that is internally consistent because it measures a single construct exhibits high test homogeneity.

Step 3: Final Answer:
The characteristics of a test measuring a single construct with internally consistent items is known as Test homogeneity.