Answer:
validity
Step-by-step explanation:
Validity: In research methods, the term "validity" is determined as the degree to which a particular measurement, concept, or conclusion is being well-founded or described and therefore accurately and precisely corresponds towards the real world. In other words, it is described as one of the different measurement tools that generally measures what it claimed to measure.
In the question above, one would question the validity of the researcher's questionnaire because it didn't measure what it should have been.