Assesses the consistency of observations by different observers. validity inter-rater reliability the control group attrition

Inter-rater reliability

Explanation:

 The inter-rater reliability is refers to the agreement between the raters and it is also known as the inter-rater agreement and concordance.

This is basically used for assessing the consistency of the given observation by different types of observers. It is one of the aspects of the test validity in which the the consistency are estimated according to the behavior.

 According to the given question, the inter-rater reliability is process which refers to the inter observer in which we can make consistent estimation with the similar phenomenon.  

 Therefore, Inter-rater reliability is the correct answer.

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