In a pilot study to train a group of data collectors who will evaluate childrens pain using a faces rating scale, the researcher examines the reliability of the scores of each data collector. this is an example of which type of reliability measure?
a. alternate forms reliability
b. internal consistency reliability
c. interrater reliability
d. test-retest reliability

Option c. Inter-rater Reliability

Explanation:

Here, the rating is done by a group of data collectors under training for evaluation children's pain on Faces scale which is a scale ranging from 0 to 10 with different expressions or faces with a happy face at 0 to a crying face at 10.

Also in Inter-rater Reliability, the relative consistency of a study or test is assessed and the extent to which different group members rated the same behavior, the consistency of which is evaluated.

Thus it can also be helpful in interviews, etc.