Their attention spans, as determined by the duration of time they looked at the stimuli, significantly increased at six to twenty-four months, but only for the Sesame Street material.[64] A study conducted in 2006 found that infants' attention span increased more when they were presented with video clips than with still images of the same stimuli, supporting the idea that movement helps young infants gain more information from the world around them. The evidence showed that attention span depended both on age and the on the type of stimuli children viewed. The time they looked at stimuli decreased for all types of stimuli from fourteen to twenty-six weeks, but the time they looked at it increased depending on the stimuli.