Which of the following is true about a study that is valid and reliable?

Question

BlackTom AI · Accepted Answer

When evaluating what constitutes a study that is both valid and reliable, we need to unpack the meanings of validity and reliability and see which option aligns with both concepts.
Option 1 asserts 'It is called a marketing research study.' This is about the domain or designation of the study rather than its scientific quality. Being a marketing study does not inherently guarantee validity or reliability, so this statement is not a definition of a valid and reliable study.
Option 2 states 'It measures what it is supposed to measure and produces almost identical results in repeated trials.' This captures the core ideas: validity refers to measuring the intended construct or phenomenon, and reliability refers to producing consistent results across repeated measurements or trials. Together, these describe a study that is both valid and reliable.
Option 3 claims 'It is expensive to implement and complete.' While cost can be a practical consideration, cost is not a defining feature of validity or reliability. A study can be valid and reliable regardless of expense, so this statement doesn't define validity or reliability.
Option 4 says 'It measures subtle differences in the population being studied and produces almost identical results in repeated trials.' The phrase about measuring subtle differences touches on sensitivity or precision, which can be relevant, but validity and reliability are not defined by the ability to detect subtle differences alone; reliability could be high even when the measure is not truly valid for the intended construct. This makes it an incomplete or potentially misleading framing of validity.
Option 5 states 'It is difficult to produce without expert researchers.' Difficulty or required expertise is about practicality and expertise, not about whether a study is valid and reliable. A study could be well-designed and valid/reliable or not, independent of how hard it is to produce, so this is not a defining characteristic.
In summary, the option describing measuring the intended construct and yielding consistent results across repeated trials best aligns with the concepts of validity and reliability, while the other options mix practical, contextual, or misaligned features with the core definitions.

Which of the following is true about a study that is valid and reliable?单项选择题

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