While the increase in response time for each additional element within a display is 250–350 ms per item outside the subitizing range, there is still a significant, albeit smaller, increase of 40–100 ms per item within the subitizing range.[2] A similar pattern of reaction times is found in young children, although with steeper slopes for both the subitizing range and the enumeration range.[6] This suggests there is no span of apprehension as such, if this is defined as the number of items which can be immediately apprehended by cognitive processes, since there is an extra cost associated with each additional item enumerated. However, the relative difference in costs associated with enumerating items within the subitizing range are small, whether measured in terms of accuracy, confidence, or speed of response. Furthermore, the values of all measures appear to differ markedly inside and outside the subitizing range.[1] So, while there may be no span of apprehension, there appear to be real differences in the ways in which a small number of elements is processed by the visual system (i.e., approximately less than four items), compared with larger numbers of elements (i.e., approximately more than four items).