Final answer:
Screening tools in health need to be both specific and sensitive, accurately measuring and classifying health conditions. These attributes ensure the validity of screening results.
Step-by-step explanation:
Screening tools must be both specific and sensitive to the health issue they are intended to detect. This means they need to measure accurately what they are supposed to measure and correctly classify participants as either having or not having a particular condition or trait. The qualities that a screening tool must possess are relevance, effectiveness, speed, robustness, and accuracy and reproducibility. These attributes ensure that a screening tool can provide reliable data that reflects the true presence or absence of a health issue among those screened.
Answering a multiple-choice question about such a quality, the correct option here is 'valid,' as it corresponds most directly to a measurement that measures what it claims to measure and accurately classifies individuals. Thus, for question 2 of the review questions, the answer is:
c. valid.