[[Image:Force-feedback.jpg|250px| ]]
Normal 0 false false false EN-CA X-NONE X-NONE MicrosoftInternetExplorer4 According to this study conducted by Miika Silfverberg in 2003, the difference in errors between high visual feedback and no visual feedback can be neglected when high haptic feedback is provided. However, the errors raise over 10% when low haptic feedback is provided. Amongst the explanations that could be given is the fact that visual information is usually processed in a very conscious manner, requiring attention. Haptic information can be processed in a less conscious manner, and our brain can interpret it faster. For example, two pieces fitting tight together into position, a button reaching its lowest position, an on and off switch in a middle invalid position, etc. Data that may support this explanation was collected by Stephen Brewster and Lorna Brow in 2004:
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The results of this graph suggest that with tactile feedback, PDA use requires less mental demand, and is less annoying.
