It has been pretty well documented that interviews are an exercise in confirmation bias. An observing subject just 10 seconds into watching an interview could predict with 90% accuracy whether or not the candidate would be hired. It appears that the first impression is made and the rest of the interview is simply confirming it. One way to overcome this which has proved effective are the implementation of hiring committees. Importantly these committees are never in communication with the candidate and serve to assimilate the feedback from a variety of groups who conducted interviews. The decision is then made based on an assessment of this first hand data by those people that haven’t themselves formed their own first hand impression. It is so different to what is usually done that it sounds ridiculous, but with Google having adopted it and seen success from using the method it is worth taking seriously.