CTAC 225 Lecture 3: Chapter 3
Document Summary
External stimuli: signs, signals, or any other stimuli transmitted by sources other than the receiver and picked up through the senses. External interference: noise that makes it difficult or impossible to perceive or identify external stimulus. Internal stimuli: nerve impulses received by the brain as a result of your own physiological or emotional state. A physical example would be hunger, an emotional example would be joy, and a cognitive example would be your thoughts. Internal noise: conscious or subconscious stimuli within the person. A conscious example would be sitting in class and wondering if you turned the stove off at home. A subconscious example would be feeling discomfort when someone stands too close to us. Reception: neutral registering of the stimulus, which is either paid attention to or not. An example would be noticing that a train is rumbling by. Perceptual screens: psychological filters that affect how you perceive the stimulus.
