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PSYB65 Ch 7

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Ted Petit

PSYB65 Ch 7 Memory What Is MemoryLearning a relatively permanent change in bhvr as a function of experiencean organism recalls these experiences and changes its bhvr accordingly Learning and memory are two sides of the same coinexperiencedependent behavior Others argue learning is concerned w attending to the info encoding and storing it for later use consolidation memory is w retrieving the info where it was stored retrieval in the brain Forgetting might actually serve an important function in your brainSensory Memory and ShortTerm MemoryMemory requires info that is gathered by the senses to be perceived and encoded Turning a bright light on in a dark room looking at it and then turning it offhow long can you see an image of the light is Neisers experiment of a type of sensory memorythese shortterm sensory memories are either iconic memory visually based or echoic memory soundbasedIconic memory was remembering specific features of visual info for a short period of time and is very fragile and reliant on peripheral stimuliLetters would be rapidly transferred to a more durable format to be able to be recalled short time later Sperling found that delays of about 500 milliseconds resulted in the largest decrease in iconic memoryparticipants were reading f a decaying visual trace Two sides of the brain perform this task equally well and the left hemisphere has an advantage for identifying letters and numbers Echoic memory Is very fragile and a temporary memory store The echoic memory trace is much stronger immediately after the perception of sound Sensory memorymore durable form of memoryshortterm memory holds info for periods beyond what can be stored by sensory memory can be any visual auditory tactile gustatory or olfactory modality An experiment involving complex visual stimuli that resembled checkerboards instead of letters found that this memory store lasted much longer than two secondsfollowing the initial stimulus w a distraction another visual stimulus did not affect performance of this task which is unlike whats observed w iconic memorythis is evidence of a separate form of visual memory that differs f iconic memory and is responsible for holding relevant info for slightly longer periodsthis type of memory is shortterm visual memory The differences btwn echoic memory and shortterm auditory memory a form of auditory memory that differs f echoic memory and is responsible for holding relevant auditory info for slightly longer periods of time than echoic memory can be illustrated by the doubletake effect An experiment shows that performance was best when the interval btwn the recall of a number in the ear that ignored one speech and the request from the experimenter was short less than five seconds and poorest when the interval was longer Another difference btwn shortterm memory and sensory memory is that shortterm memory has a limit to how much info it can store
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