Reliability and Validity

The purpose of this article is to summarize, integrate, and evaluate the many ways interviews can be structured. Reliability and validity are key concepts in the process of selecting among job applicants, since the main goal of selection is to make accurate predictions about which individuals will perform well on the job. Reliability is the consistency of measurement, or the degree to which an instrument measures the same way each time it is used under the same condition with the same subjects (definition from: www.technetium.cen.brad.ac.uk). For example if the applicants are given different selection tests it would be very difficult to compare the difference among applicants. Alternatively, if a number of candidates are given the same selection test, the test should provide consistent results concerning individual difference between candidates. Six types of reliability are considered: test-retest, interrater reliability, candidate consistency, interviewer-candidate interaction, internal consistency, interrater agreement. For a selection measure to be useful it's not enough for it to be repeatable or stable (i.e. reliable), it must also be valid. There are numerous ways of assessing validity, but they all focus on two basic issues: what a test measures and how well it has measured it. Three types of validity information are considered: job relatedness, reduced deficiency, and reduced contamination. Personal interviews are used by all employers and companies for selecting their staff. Interview is one of the most important steps in the staff selection procedure. Interview proves important because it connects both the employers as well as job seekers. It assists employers in selecting a right person for a right job. It also helps job seekers to present their job skills and acquire a desired position on merit.
There are 15 key components to consider when conducting a job interview. First key component is base questions and job analysis. There are varieties of ways