PSYC 1 Lecture Notes - Lecture 4: Prosopagnosia, Neural Adaptation, Parallel Computing
13 Sep 2016
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Document Summary
Sensation is the process by which our sensory receptors and processes receive information from the environment: physical part, objective reality. Perception is the process by which our brain interprets sensory information: psychological part, subjective reality. Bottom-up processing: perception starts at sensory input (stimulus, data-driven. Top-down processing: perception that is driven by cognition, brain applies what it knows and what it expects to perceive, filling in the blanks along the way. Sensation: reception of sensory information (stimulation by energy, transduction means transforming information to nerve activity, transmission is sending information to brain for processing. Absolute minimum: minimum amount of stimulation needed to detect the stimulation 50% of the time. Difference threshold: the minimum difference in two different levels of stimulation that a person can detect 50% of the time. Signal detection theory: refers to whether or not we can identify stimuli especially amongst background noise: called a hit if we identify the stimulus.
