sensory areas. They found support for the enhancement of targets when motion sensitive neurons in the middle temporal (MT) areas of monkey brains were activated during a cued transparent random-dot surface task. As there was more activation in the MT region when there was a motion related to the attended surface or object as opposed to the unattended surface or object, even though the two surfaces were overlapping. Event-related potential (ERPs) Evidence from numerous event-related potential (ERPs) studies have found that there is an enhancement of objects when attention is focused on them. This is associated with an N1 enhancement over the occipital-temporal areas. However, a study by Martίnez, Teder-Sälejärvi, Vazquez, Moholm, Foxe, Javitt, Russo, Worden and Hillyard (2006) found that although there was N1 enhancement in this region, the enhancements relating to object-based attention were smaller in N1 amplitude than the enhancement for space-based attention. Functional magnetic imaging (fMRI) Converging evidence of sensory enhancement has been found in functional magnetic resonance imaging (fMRI) studies. A study by O'Craven, Downing and Kanwisher (1999) found that when their participants attended to one attribute (face or house) this led to an enhancement of the blood oxygenation level dependent (BOLD) signal change in the area of the brain that was responsible for processing that specific attribute as well as the brain region that is associated with processing task-irrelevant attributes that belong to the attended as opposed to the unattended object. Neural activation related to attributes that were not relevant to the task differed in relation to whether the attribute belonged to the attended or unattended object which supports sensory enhancement. It would suggest that attention is enhancing the neural representations of the objects attributes as a whole regardless of the relevance to the task. Arrington, Carr, Mayer and Rao (2000) found additional support for sensory enhancement. They found that when an individual was attending to a region of space that was bound by an object it induced stronger brain activity as opposed to when they were attending to an empty space, not bound together by an object. Thus giving evidence that could indicate that object-based selection could be utilising additional mental resources on top of location-based spatial selection. In saying this, the results of the fMRI studies do not examine whether the degree of enhanced activation is equal in all aspects of the attended object, it just shows that there is enhancement for