The environment can greatly affect our perception and the ability to perform a task. No matter how much we try to live our lives digitally, the analogue part of it will not go away. At least, not anytime soon.
When the user performs a task, she performs it in a unique environment. There are factors and distractions that could just as much break the concentration as ease it up.
In their book “Pervasive Information Architecture”, Andrea Resmini and Luca Rosati make the point that information and contexts flow in our daily lives. We should not be considering a usage of an app or content for that matter as a stand-alone act. We shall be taking the environment and context into account.