Visual Recognition And Its Effects On The Brain - 1293 Words

Perception is based on ones ability to convert physical stimuli into behavioral responses. The processes of perception can be viewed as fluid always free flowing. Physical stimuli being sent to the brain being converted into information an in return a behavioral response is expressed. When the brain suffers brain damage a lesion is caused and the brains elasticity will work around the lesion so the brain can still function. However, the lesion is still in the brain. Visual recognition is selective attention in vision where one has the ability to recognize objects, or people’s faces (site). Agnosia is defined as ones inability to recognize sensory inputs. Agnosia is typically a result of brain injury (site). When one suffers brain damage†¦show more content†¦Journal of Vision 2015). There was an experiment conducted where Participants were calibrated with an 8-dot calibration before the start of each task. Subsequently, each participant did both the Number and the Area Task, with order counterbalanced across subjects. Participants had to verify whether the cumulative area was higher for the blue or yellow side, independent of number. In the Number Task participants had to verify whether the total number of items on the screen was higher for the blue or yellow side, independent of cumulative area. The experimenter stayed with the participant for four practice trials in order to make sure that the participant understood which dimension to attend to on each Task. Each trial was presented for 2000 milliseconds and participants were able to respond at any time during that period. The stimulus stayed up after the response, allowing eye tracking to continue for the full 2000 millisecond period. However, all of the reported results are reduced to the participant s response time on the particular trial. All eye-tracking variables were extracted from the data by examining fixation points along the horizontal and vertical axes; fixation points were determin ed with thresholds on both velocity and position. Any samples that were unreliable were removed from the data analysis, because the participant blinked or looked