1. A method of managing a quality of service (QoS) of an application running in a networked computing environment, the method comprising the steps of: a computer generating a model of a cognitive focus of attention of a user, the model based on information received from one or more hardware monitoring devices external to the computer or one or more software tools that monitor one or more respective states of the user, and the one or more states corresponding to one or more respective software applications running on a computer network; the computer determining one or more respective measurements of an actual QoS for the one or more software applications; based on the model of the cognitive focus of attention of the user, the computer determining one or more estimations of a perceived QoS for the one or more software applications, the perceived QoS being a level of quality of service being perceived by the user via the cognitive focus of attention; the computer determining one or more respective current usages by the user of the one or more software applications; and based on the generated model of the cognitive focus of attention of the user, the one or more measurements of the actual QoS for the one or more software applications, and the one or more current usages by the user of the one or more software applications, the computer determining an adjustment to the actual QoS of a software application included in the one or more software applications, while maintaining unchanged an estimation of a perceived QoS for the software application, the estimation included in the one or more estimations.