Rorschach inkblot test results diagnose many normal adults as disordered. This indicates that the test has little

Little validity

Explanation:

Validity in research describes the degree or level at which the test measure or examine what actually it is designed to measure. In other words, validity of a test is the degree to which a test measures what it claims to measure.

Hence, in this case, the Rorschach inkblot test results indicated "Little Validity" at it diagnose many normal adults as disordered. Which means, the test did not measures what it claims to measure.