Focus groups can be wrong. "Yellow Walkman" story is appropriate http://www.alexandercowan.com/yellow-walkman-data-art-of-customer-discovery/ http://www.alexan

Focus groups can be wrong. "Yellow Walkman" story is appropriate http://www.alexandercowan.com/yellow-walkman-data-art-of-customer-discovery/ http://www.alexandercowan.com/yellow-walkman-data-art-of-cus... "The moral of the story is that you need natural behavior for quality observational learning."