PSL440Y1 Chapter Notes - Chapter 2: Transcranial Magnetic Stimulation, Stimulus Modality, Achromatopsia
Document Summary
Sensation and perception provide the raw material for cognition. Our perception is not a simple registration of sensory stimuli but sophisticated cognitive processes work on the sensory information almost immediately and produce the brain"s interpretation, our existing knowledge guides these dynamic processes. The sensory stimuli are typically ambiguous and open to multiple interpretations. The two problems with sensation and perception: sensory input does not contain enough information to explain our perception, the world presents us with too much sensory input to include into our coherent perceptions at any single moment. We do not just register the picture as a whole when we see an image, but we see only relatively fine details in a small region point of fixation. Searching is one of the ways to deal with excess input. We engage in selective attention which allows us to choose part of the current sensory input for further processing at the cost of other aspects on input.
