What does Dr. Nolan's anxiety measure possess if experts agree that it appears to assess symptoms of anxiety?

The measure's ability to assess symptoms of anxiety, as recognized by experts, indicates that it has face validity. Face validity refers to the extent to which a test or measure appears to be effective in measuring what it is intended to measure, based on the subjective judgment of experts or individuals. In this case, the agreement among experts that Dr. Nolan's anxiety measure effectively captures symptoms of anxiety suggests that it is perceived to be relevant and appropriate for its intended purpose, thus demonstrating strong face validity.

In contrast, criterion-related validity assesses how well one measure predicts an outcome based on another measure, while content validity analyzes whether a measure covers the appropriate content within the domain it aims to assess. Construct validity encompasses the degree to which a test truly measures the theoretical construct it is intended to evaluate. Therefore, in this context, the recognition by experts aligns specifically with face validity, as it is based on their direct assessment of the measure's appearance in relation to anxiety symptoms.