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Lecture

PSY270H1F Lecture 3

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Department
Psychology
Course
PSY270H1
Professor
Kristie Dukewich
Semester
Fall

Description
PSY270H1F L3, Sept 26, 2012 o When his deficits first appeared, experienced a prolonged period of depression Language internalization in men vs. women: o His experience was very jarring Q: Isnt language more lateralized for men than women? o He keeps writing the same things over & over again A: Most recent publication (meta-analysis) shows that because his memory only lasts about 30s or less there is no significant different lateralization btwn men & Sometimes as little as 7s, only a sentence women Couldnt finish sentences When answering a , often already forgotten it Adaptiveness of being left-handed? He says he never has thoughts 50% of the 12 presidents of the USA since WWII were left- Repeatedly happy to see his wife handed when only 10% of their general population is left- handed. How this relates to memory: 2ndtime Bill Clinton ran, all candidates left-handed Memory is the key to who we are, w/o it we cannot Left-handed pl over-represented in positions of leadership associate info, events, experiences in time Why would left-handers potentially be better leaders? o w/o it there is no coherence to our experience of Possibly related o hemisphere specialization possibly more memory. creative Clives story shows us that memory is incredibly complex Dominant in right hemisphere spatial + global/holistic o Ex. How come he knows how to write but h cant rmbr info See the big picture more anything else? Why can he recognize his wife but cant o process whole picture recognize his kids? Why isnt he surprised to look in the o Possibly could be selected in a small %age of the mirror and see an older version f himself? How can he population because not everyone can be a leader recognize his wifes older face when his memory only lasts 30s? Ch.5: Sensory Memory, Short-term & Working Memory o These are some Qs that will gradually be discovered as A framework for memory we learn more about the brain Sensory memory Short-term memory Memory: (as a thing) the record of info about our past Working memory experiences o complex Ch 6: Distinguishing STM & LTM Process: Mental operations A Framework for Memory o Encoding / Storage / Retrieval of info Sensory = briefest form Prezi ... Modal Model of Memory Proposed by Atkinson & Shiffrin (1968) Computer metaphor structures & operations o 3 types of memory (sensory, stm, ltm) Structural features of the model = skeleton of framework I Clive Wearing provided One of most tragic features in cognitive neuropsychology For each structural: Was in prime of life when herpres simplex virus (causes cold o Format of info what code used to represent that info in sores) invaded his brain swelling damage to dif brain the mind structures o Capacity (how much?) Worst case of amnesia known, lost much of memory, only o Duration (how long?) recognized wife Control processes: active processes controlled by the Lost long-term memory person Lives entirely in present o Ex. Rehearsal to try to facilitate encoding or keep the May have had damage to hippocampus, medial temporal info present lobe, & frontal lobe His caregivers encouraged him to keep a diary, they thought it might help his memory Sensory Memory o I am now really awake he keeps scribbling things ou Briefest memory systems & editing them o Most primitive, based on direct sensory stimulation o Assists in processing sensory infoo Not a signal left over in sensory recs, is in brain Modality-specific o Dif qualities (format of info varies w sensory modality) Ex. Code for audition = auditory o Dif capacities & durations Synaesthesia crossover, some ppl have pathways in brain crossed; of vision & audition generally in LTM Iconic Memory Not about activity of retina Seeing imagine gradually as slit moves over it Studied most since primarily visual animals Anorthoscopic perception: seeing-more-than-is-there Visual based tech developed in last 40yrs o Active reconstruction o Most tech available to us is visual based o Constructing the world, sampling thru eye movements = Visual stimulation captured from retinas o According to retina, saw something that didnt make o Sensation lasts longer than stimulation (persistence) sense Icon longer-lasing mental presentation Info on retina constantly replaced Span & duration? But iconic memory helped to glue together the varied retina info o So iconic memory not based on sensory stimulation of sensory recs, based on mental representation Trans-saccadic memory o Eyes constantly moving o Fixations avg ~ 250ms When we stop to get something on our fovea o Saccades ~ 30ms Jumps btwn fixations Very quick o Iconic memory helps make image coherent, thru: Integration thru object files o Representations of objects independent of specific Partial report method (George Sperling, 1960) location; often tracked by basic characteristics (ex. Colour) Recording letters in an array Cue which row he wa
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