These categories are not mutually exclusive. That is, the user is approaching the appliance with a more relaxed attitude and is more interested in a pleasant experience than in performing a specific task, such as writing a paper, completing a spreadsheet, or sending email. A game-playing device is an example of an appliance used more for fun and compelling content than for accomplishing a task. Tasks are generally less structured than those performed on PCs. The user may not know exactly what sort of entertainment is of interest and may take some time to find something of interest.
Users are likely to have varying levels of concentration and attention during the interaction.
Generally, interaction occurs in a relaxed, comfortable, and low-stress environment such as the living room. The relaxed nature of the interaction characterizes both the setting and the user's attitude. Therefore, a pleasant experience is always preferred to an efficient one. However, in the entertainment domain a pleasant and compelling experience is as important as efficiency. Above all, predictability is more important than efficiency.