Neonatal Nurse Practitioner Practice Exam

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What does validity measure in a research instrument?

Consistency in measurement
Degree of actual measurement
Correlation of data to hypotheses

The correct answer is: Degree of actual measurement

Validity refers to the degree to which a research instrument accurately measures what it is intended to measure. This means that if a tool is valid, the results obtained from it should truly reflect the specific concept or variable it is designed to assess. For instance, if a test is supposed to measure intelligence, validity ensures that the test actually measures intelligence and not something else, such as test-taking ability. In a broader context, establishing validity can involve various types such as content validity (how well a test represents the entire domain it aims to cover), construct validity (how well a test aligns with theoretical concepts), and criterion-related validity (how well one measure predicts an outcome based on another measure). Therefore, identifying the degree of actual measurement addressed in the correct answer encapsulates this critical aspect of research design and ensures that the conclusions drawn from the data are both meaningful and applicable.