Attention • Attentional processes interact and affect one another • Arousal: alert and physically present . Bottom up attention: physical stimuli that are automatic attention grabbers . Top down attention: the observer wants to pay attention to something ? Goal to focus on • Space based attention: driving down the road and looking infront of you too see for cops . Feature based attention: keeping an eye on a crazy driver to make sure he doesn't hit you · Spatial neglect: effects higher order processing, not spacial order processing · The primary sensory cortexes would be active but are not picked up by higher order processing ? Sensory processing is not gone it works fine, but attention is affected and thus loose that space from lack of higher order processing ? Most often from right hemisphere due to location of spatial processing in that area
? Parietal lobe damage · Spacial recognition . Whole bundle of sensory problem ? pathologically asymmetric spatial behavior, caused by a brain lesion and resulting in disability • Selective attention: attend to relevant information and filter out irrelevant information ? Bottleneck analogy ? The attentional blink: the two targets are shown within 500ms of each other ? Can catch first target but often miss second target because the selective attention for the first target used up much of your capacity to focus . Your limits for attention are reached . The more time between the two targets, the better you will be able to detect it · Change blindness: failure to notice change in environment due to attention focused on something else
. We filter out what is distracting when using selective attention ? Monkey basketball video ? Filter models: . Along the path of attention, we filter out the information that is irrelevant . Early: Boradbents, we know this isn't the case . We filter out information at the level of perception · at sensory buffer we choose what continues on ? Information in sensory buffer that does not continue to move on is decayed after a couple seconds ? Dichotic listening tasks supported this claim · Harder to combine two different input channels and recall groups of numbers that were heard at the sime time · Shadowing tasks: showed that people do not process information without meaning . Could give basic facts but not the whole message