Consistency in the use of terminology for the icon labels and functionality they represent also seemed to impact the speed of recognition. For example, those who were asked to find a ‘clock’ completed the task slightly faster than those who were trying to find a ‘recent or history’ function. In both cases, the function was represented by the same ‘clock’ icon.
Another aspect that could influence speed is proximity of similar shapes, as well as proximity of icons which represent related concepts. For example, both flag and folder icons (top right) are based on a similar size rectangular shape, which may have caused a slight delay in response. Another example is ‘important’ (flag) and ‘favorites’ (star)–they represent similar concepts and could therefore be mistaken for one another, particularly if placed close to each other.
Therefore, it was not the style of the icon set but rather the individual icons in both sets, their shapes, and their position in relation to each other that made the most difference in the speed of recognition in this test.