We are very pleased to welcome Prof Mark Williams to the Nonsense Dialogues. Mark is the author of the best selling book “The Connected Species” and is a cognitive neuroscientist with an extensive international career. Randal invited him to present the neuro cognitive perspective of psychometric assessments with the obvious expectation that Mark would join him in denigrating the whole domain. Well, Mark sort of does do this but also provides a great range of insights into the challenges of transferring psychological science to practical applications. David does his best to defend the interests of the psychometric industrial complex but finds himself being less antagonistic than he expected.  Did we come to a conclusion? You’ll have to listen to find out.  All in all, we think having a guest with actual expertise greatly improved the quality of the discussion. Have a listen and see what you think. We’ll probably do it again. And sooner, if we get some positive feedback on this episode.  Being good evidence based practitioners, we are seeking feedback from our audience on our podcasts. So please tell us all the things we are doing well as well as pandering to your innate drive to criticise the work of others. We may listen and adjust or we may just continue to be ourselves and do things our own way, dammit.