Kannass, Oakes, and Shaddy (2006) also found that children who are effective at inhibiting responses to distracters are able to maintain longer attention span. Researchers also hypothesize that there will be no interaction between age and content of use such that the relationship between high levels of exogenous stimuli and shorter visual spatial attention span will remain constant for all ages. There will be no decrease in the effects of exposure to exogenous stimuli with age. This prediction is grounded in attention development theory that states that around 3 years of age, typical development should show children exhibiting more focused, sustained attention even when presented with distracters (Kannass, Oakes, and Shaddy, 2006).