Answer:
a. inter-rater reliability.
Explanation:
This question is incomplete. The given options for this question are:
a. inter-rater reliability.
b. descriptive validity.
c. concurrent validity.
d. test-retest reliability.
In psychology, the term inter-rater reliability refers to the extent to which two or more raters (or observers, coders, examiners) agree. In other words, it refers to the fact that a rater/specialist B confirms the diagnosis made by a rater/specialist A. If many raters agree on the diagnosis, then it has a high inter-rater reliability.
In this example, Clifton went to see 3 different psychiatrists and the 3 of them gave him three different diagnosis. Therefore, none of them agreed on the previous diagnosis and we can say that this demonstrates poor inter-rater reliability (since there were 3 different specialists)