Final answer:
The primary purpose of using the criterion of job performance in employee evaluations is to assess and measure how well employees are performing in their roles and responsibilities within an organization.
Step-by-step explanation:
The primary purpose of using the criterion of job performance in employee evaluations is to assess and measure how well employees are performing in their roles and responsibilities within an organization. Job performance evaluations help identify areas of strength and areas for improvement, which can be used to provide feedback, set goals, and make decisions regarding promotions, raises, or further training and development opportunities. It also helps organizations identify poor performance and take necessary actions, such as providing additional support or implementing performance improvement plans.