The hallmark of an effective research instrument is__________?
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Answer: C. both
Explanation
Both validity and reliability are essential hallmarks of an effective research instrument. Validity ensures the instrument measures what it claims to measure accurately. Reliability guarantees that the instrument yields consistent results across multiple administrations. Research instruments must be both dependable and accurate to produce valid conclusions. Psychometric testing evaluates both internal consistency and construct validity. Flawed instruments compromise the integrity of entire research studies.
Test developers validate academic exams to ensure they accurately test knowledge. Medical diagnostic tools require high reliability to ensure consistent patient diagnoses. Survey researchers pilot questionnaires to verify both reliability and validity. Validity alone ignores the critical requirement for measurement consistency. Reliability alone is insufficient if the instrument measures the wrong concept. None of these is wrong because both properties are required.
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Answer: C. casual comparative
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Answer: A. historical
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Answer: A. major
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Q4. The characteristics of an effective research tool are presented here__________?
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Answer: D. all of these
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Answer: D. Qualitative
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Answer: B. Research
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