Question

Andrea is conducting a study measuring the effectiveness of a new drug to treat obsessive-compulsive disorder (ocd). she has to select a scale that will consistently provide objective data about ocd symptoms on a weekly basis. andrea needs the scale to provide consistent results that gradually change only in response to the positive effects of the drug. andrea needs a scale with good:

Answer 1

I believe the answer is: Reliability
Reliability in this context refers to the ability to provide consistent and accurate information in order to know the true difference before and after using the drugs, otherwise the data collected by Andrea would be inadmissible and it would mess up the whole research.