If you do all your user testing on the same 5 people (an extreme case of 'favourites') then you're product is going to be heavily skewed towards their particular needs, opinions, goals and expectations. That's pretty obvious, isn't it?
... But this alone doesn't create a case for throwing user research out entirely. Quite a few epic failures relate to over-reliance on the vision of a "genius" without doing any research to ascertain whether the market exists, whether the business model is viable or whether the designed experience is fit-for-purpose. Wait, haven't we had this discussion before on this list? A few times? Harry ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... disc...@ixda.org Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help
