Question

question 18
______ refers to the ability of an instrument or tool to accurately measure what it is supposed to measure.
a. operational definition
b. validity
c. generalizability
d. reliability

Explanation:

• Operational definition describes how a concept is measured, not accuracy of measurement purpose.
• Validity specifically refers to whether a tool/instrument measures what it is intended to measure.
• Generalizability relates to applying results to broader groups, not measurement accuracy of the intended construct.
• Reliability refers to consistency of measurements, not accuracy of the measured construct.

Answer:

validity