Gerry McMahon is an acknowledged national expert in People Management. He has over 35 years’ experience - as a workplace investigator (on bullying/harassment/ disciplinary/dismissal/grievance issues), trainer, negotiator, facilitator, mediator, arbitrator and team builder - across a wide range of employment sectors. He is the M.D. of the H.R. training and advisory company Productive Personnel Ltd.
Gerry has also had an extensive range of books and articles published and been a columnist with the Industrial Relations News, Irish Times, Sunday Business Post, and Irish Independent and expert commentator on H.R./Employee Relations for R.T.E. and TV3/Virgin. He has also served on numerous Legal Island and C.I.P.D. judging panels and is a Council member of the Irish Association for Industrial Relations.
Contact: Tel. 087-2471415; E-Mail: ppl1gerry@gmail.com
The effectiveness of various selection tests in predicting performance has been the subject of extensive research. Regrettably, however, the conclusions reached are far from unanimous. Given the growing use of such tests in Ireland, especially for filling managerial posts, this must be a matter of some concern. Hence, testing staff for selection purposes is a process to be treated with care.
Is It A Reliable And Valid Test? ⚓︎
A reliable test is one that enables consistent measurements, at different times and in different circumstances with different subjects e.g. a ruler or a weighing scale. A valid test measures attributes or predictors that relate to job success. The analysis of test scores against performance evaluations is one means of assessing
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