ere is little or no interaction within LIP, which suggests that attentional priority of each part of the field is predominantly independent.
Lip did show the focus of attention in this study, but this could not be determined by looking at only one neuron (Bisley and Goldberg, 2003, 85). The actively evoked stimulus does not define the attention of that stimulus, even though it is described by LIP. However, LIP did predict monkey behavior because when a monkey was doing its job efficiently, activity at the saccade goal was greater and the response to the distractor was weaker. LIP activity does not predict where or when a saccade will occur because many other attention-worthy events that also drive LIP may contaminate the saccade plan rendering it useless as a motor signal. Also, LIP activity is much greater to a NO GO signal than to a GO signal. The results show that in the situation where there is dissonance between a saccade plan and LIP activity, the oculomotor system must ignore LIP.
Eye movements and visual attention are correlated but they do not always correspond directly, so a method is needed to relate shifts in visual attention to the eye movement associated with this shift. Salvucci (2000) has proposed a model of eye movements and visual attention which uses several different eye movement models for specific domains, and combines them to form a general model which can be used to solve nay problem. He calls this the Eye Movements and Movement of Attention (EMMA) model. This addresses a problem of older cognitive models which did not take the outside world into consideration. They proceeded as if external stimuli were already encoded in memory representation and that the stimuli acted on these representations. The newer models, and particularly EMMA, interact with the world through simulated vision audition,and motor actions.
EMMA assumes that shifts in attention cause eye movements, and that subsequ...