KSA Psychometric Testing & Measurement Theory 3

Question 1

Which statistical index, ranging from -1.0 to +1.0, is used to evaluate how well a test item discriminates between high and low scorers?

Accepted Answer

Point-biserial correlation

Answer

The point-biserial correlation coefficient measures the relationship between an individual item's score and the total test score, indicating item discriminating power.

Question 2

A test blueprint (also called a test specification table) is used primarily to ensure:

Accepted Answer

Proportional content coverage aligned with the KSA domain

Answer

A test blueprint maps the number and type of items to each content domain, ensuring the test represents the KSA domain in appropriate proportions.

Question 3

Which type of validity evidence is gathered by examining the relationships between the assessment and external measures of theoretically related and unrelated constructs?

Accepted Answer

Construct validity

Answer

Construct validity evidence includes convergent validity (correlates with related constructs) and discriminant validity (does not correlate with unrelated constructs).

Question 4

Parallel forms reliability (alternate forms reliability) is BEST suited for reducing:

Accepted Answer

Practice effects and item memorization across test administrations

Answer

Using alternate parallel forms minimizes the impact of memory and practice when retesting candidates, as they encounter different but equivalent items.

Question 5

In IRT, the item characteristic curve (ICC) depicts the relationship between:

Accepted Answer

A candidate's latent trait level and the probability of a correct response

Answer

The ICC is an S-shaped curve showing how the probability of a correct response changes as a function of the candidate's ability (theta) on the latent trait continuum.

(KSA) Certified Knowledge, Skills, and Abilities Assessor Practice Test

(KSA) Certified Knowledge, Skills, and Abilities Assessor Practice Test

KSA Psychometric Testing & Measurement Theory 3