The weight of the device plays a big part when it comes to tablet use. This is because a tablet is meant to be held on one had for long periods of time whilst the other hand operates the device. This means that not only does a person have to hold the device in one hand, but also has to resist the force of their other hand pushing upon it. When using a Smartphone, only one hand is used and even then, the device is operated by the thumb of the same hand. Portable game consoles are controlled using two hands holding the device (except the Nintendo DS). A tablet device however is a one handed device unless a person is reading; therefore, it cannot be too heavy. When you are testing a tablet device, ask yourself if you would feel uncomfortable holding its weight for an hour.