Perceiving is a matter of picking up information over time. When perceiving is thought of as a constructive process or as information pickup guided by specific anticipatory schemata, no filter is required at all. One principal goal of Gibsonian research is to discover the types of structures to which perceivers are actually sensitive; another is to find out just how skills of information pickup develop and mature. Selective looking may become somewhat more difficult if the perceiver has been relying partly on featural information. The selective looking technique was originally devised to demonstrate the inadequacy of the filter theory of attention and its variants. If the selectivity of perception is an intrinsic aspect of the activity itself, it should be observable in every situation and at every age. Perceivers can follow the action of a natural event with kinetic information alone.