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?

Concurrent validation

Explanation:

Concurrent validation tests are carried out in order to determine if a design or production process (or a group of designs and production processes) within a facility will perform appropriately and as intended. The information generated during this process should be documented to serve as record that the validation process as carried out.

Concurrent validations are also carried out in other environments, like schools, and an example of a concurrent validation is the process carried out to determine if new academic tests are valid and a good measurement of students' performance. In this case, they are handed out to different groups of students and they should all yield similar results (similar curve distribution).

In this case, Apptastic administers the same test to its current designers than it does to potential candidates to fill open designer positions.