To test the validity of a selection test for advanced widget designers, Apptastic administers the test to its current widget designers. The test results are then compared with existing measures of job performance. In this instance, what type of validation is being used by Apptastic?

A) predictive validation
B) concurrent validation
C) content validation
D) construct validation
E) diagnostic validation

Concurrent validation involves administering the selection test to current employees and comparing their test results with their job performance. This allows for a direct comparison between the test results and job performance, making it a valid method for testing the accuracy of a selection test. Predictive validation involves administering the selection test to job applicants and then waiting to see whether their job performance matches their test results, while content validation involves evaluating the test to ensure it adequately measures the skills and knowledge required for the job. Construct validation and diagnostic validation are not relevant to this scenario.