PSY 308 Lecture Notes - False Alarm, Sensory Memory, Change Blindness
4 Dec 2013
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Signal is what your looking for while noise is everything else. Ie waldo is your signal and all the other objects are the noise. Lifeguard, looking for your friends in a crowd. Sensitivity : how good you are at the task. Criterion: how willing you are to detect a signal (may shift depending on costs associated with errors) Cjs better to have a miss to let someone guilty out then put someone innocent in prison. Attending to a field of stimulation over a prolonged period of time while seeking to detect a target stimulus that appears at an unknown time. We often miss large changes in our world. Occurs even when you are actively searching for a change. Observers fail to notice changed introduced during a blank screen, a blink, an eye movement, or a motion-picture cut it pan. Sensory memory a couple secs but a large capacity. If it catches your attention moved to short term memory.
