La usabilidad no se consigue con focus groups, porque éstos son encuestas de opinión a un grupo de gente. La usabilidad mide actividades/ acciones reales de un usuario concreto, no opiniones de un conjunto.
Understanding Search Usability
Understanding Search Usability
Focus groups measure group opinions about an interface. A focus group's measurements are not task oriented. The negative aspect of focus groups is a herd mentality. Granted, if I do not like an interface and genuinely would not use it, no amount of peer pressure is going to get me to change my opinion. But that is just me. Peer pressure often yields poor interfaces.
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