What aspect of reliability is assessed by interrater reliability?

Interrater reliability refers to the degree of agreement among different judges or raters when they evaluate the same phenomenon. It is crucial in ensuring that assessments are not subjectively influenced by the individual perspectives of raters. This means that for a measure to have high interrater reliability, different raters should arrive at similar conclusions when scoring or assessing the same subject or test. This aspect of reliability is essential in fields such as psychology, where standardized assessments are prevalent, to ensure that results are consistent and can be trusted to reflect the true nature of the condition being measured, rather than the biases of individual assessors.

In contrast, other options address different facets of reliability. The variation of scores pertains more to test-retest reliability or internal consistency, while accuracy in predicting outcomes relates to validity rather than reliability. Stability over time is more closely linked to test-retest reliability, which measures how consistent scores are when the same test is administered at different times.