How do reliability and validity differ in HR testing?

How do reliability and validity differ in HR testing?

• A. Reliability is the degree to which a test predicts job performance.
• B. Validity is the consistency of test results across time.
• C. Reliability is consistency of test results; validity is whether the test measures what it intends to measure and predicts job performance.
• D. Validity is the ease of interpreting test scores by candidates.

Answer: (C)

In HR testing, the main idea is distinguishing how consistent a test is versus whether it actually measures what it’s supposed to and relates to job performance. Reliability refers to consistency: a test yields stable results over time, across different administrations, or across raters. If someone takes the same test on different days and gets similar scores, the test is reliable. Validity, on the other hand, is about accuracy and usefulness: it asks whether the test measures the intended construct (for example, a candidate’s job-relevant cognitive ability or leadership potential) and, importantly for selection, whether those scores predict how well the person will perform on the job. There are several facets of validity, including content validity (the test covers the right material), construct validity (the test truly measures the theoretical trait of interest), and predictive/criterion validity (scores forecast job performance). The correct statement captures both ideas: reliability is the consistency of test results, and validity concerns whether the test measures what it intends to measure and whether those measurements relate to job performance. It’s also worth noting that reliability is a prerequisite for validity—if a test isn’t consistent, it can’t be valid.

In HR testing, the main idea is distinguishing how consistent a test is versus whether it actually measures what it’s supposed to and relates to job performance. Reliability refers to consistency: a test yields stable results over time, across different administrations, or across raters. If someone takes the same test on different days and gets similar scores, the test is reliable. Validity, on the other hand, is about accuracy and usefulness: it asks whether the test measures the intended construct (for example, a candidate’s job-relevant cognitive ability or leadership potential) and, importantly for selection, whether those scores predict how well the person will perform on the job. There are several facets of validity, including content validity (the test covers the right material), construct validity (the test truly measures the theoretical trait of interest), and predictive/criterion validity (scores forecast job performance).

The correct statement captures both ideas: reliability is the consistency of test results, and validity concerns whether the test measures what it intends to measure and whether those measurements relate to job performance. It’s also worth noting that reliability is a prerequisite for validity—if a test isn’t consistent, it can’t be valid.