ulus driven deployment of cognitive resources) ((Wolfe, 1994). Endogenous attention is the same phenomena described by top-down, parallel processing or cognitively demanding. Exogenous attention is alternatively referred to as bottom-up or pre-attentive processing and is considered to be relatively undemanding of cognitive resources. It is at the levels of integration and interpretation that attention comes into play in motion perception and in the visual system in general (Mather, 1998; Pashler, 1998; Treisman & Gelade, 1980; Wolfe, 1994). Feature Integration Theory A ( @ 9 , A ( @ 8 , A ( @ 8 , A ( @ 8 , A -( @ 8_ , A -( @ 8` 9C ( 8` 8_ 8 8 8 9 9 @ ( @ 9 , A ( @ 9 , A ( @ 8 , A ( _@ 8 , A ( @ 8 , A -( @ 8_ , A -( @ 8` U@ ?8 @ T ?@ 8 - H _} 8_ 8 H (_A |~ y@ _a * _( is@ _ serially. These other things are generally believed to constitute conjoined basic features or conjunctions. Other researchers have suggested that errors occur because of noise at the decision level. Frequently referred to as signal detection theory, this decision model suggests that we can perceive and process many things at a given time, but when we engage in a divided attention task the amount of information to be searched creates a greater probability of error at the decision level. An example of this can be found in Eckstein (1998) where it is demonstrated that when low level effects are accounted for (i.e. similarity, eccentricity and eye movement) search accuracy results appear to be consistent with a parallel and independent, but neurally noisy visual system.MOTIONIn general motion can be considered an orientation in the space time continuum(Adelson, 1991) and the human visual motion system does have a preference for motion that is consistent over time. The illusion of motion can be created by rapidly showing a s...
