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Memory Unit VII Modules 31-33.

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Presentation on theme: "Memory Unit VII Modules 31-33."— Presentation transcript:

1 Memory Unit VII Modules 31-33

2 Memory We take our memory for granted until it does not work correctly
Our memory is what defines our life Our memory allows us to recognize family, speak our language, find our way home, and locate food and water It is our memory that allows us to enjoy an experience and then mentally replay and enjoy it again *

3 Memory Without memory there would be no savoring past joys, no guilt or anger over painful recollections We would live an enduring present with no memory Each person would be a stranger, every language foreign, every task a new challenge You would even be a stranger to yourself, lacking that continuous sense of self that extends from your distant past to your momentary present *

4 Memory Memory- the persistence of learning over time through the encoding, storage, and retrieval of information Encoding- the processing of information into the memory system- for example, by extracting meaning Storage- the process of retaining encoded information over time Retrieval- the process of getting information out of the memory storage *

5 Memory Unlike computers that must process information sequentially, our brains can function on a dual-track Our brains can process many things simultaneously by means of parallel processing The processing of many aspects of a problem simultaneously The brain’s natural mode of information processing for many functions *

6 Memory Sensory memory- the immediate very brief recording of sensory information in the memory system Short-term memory- activated memory that holds a few items briefly, such as seven digits of a phone number while dialing, before the information is stored or forgotten Long-term memory- the relatively permanent and limitless storehouse of the memory system Includes knowledge, skills, and experiences *

7 Memory Atkinson and Shiffrin developed a model for memory that says things enter your sensory memory first, then it enters your short term, and lastly it is stored in your long term memory Recent research shows that your short term memory is not just a temporary shelf for holding incoming information as stated by Atkinson and Shiffrin *

8 Memory It is actually an active desktop where your brain process information, making sense of new input and linking it with long-term memories To emphasize the active processing that occurs in the middle stage, psychologists use the term working memory A new understanding of short-term memory that focuses on conscious, active processing of incoming auditory and visual-spatial information, and of information retrieved from long-term memory Right now, you are using your working memory to link the information you’re reading with your previously stored information *

9 Building memories Explicit memories- memory of facts and experiences that one can consciously know and declare Also called declarative memory We encode explicit memories through conscious, effortful processing Encoding that requires attention and conscious effort *

10 Building memories Other information skips the conscious encoding track and goes directly into storage Automatic processing- unconscious encoding of incidental information, such as space, time, and frequency, and of well learned information, such as word meanings Automatic processing produces implicit memories Retention independent of conscious recollection Also called nondeclarative memory *

11 Building memories Our implicit memory includes procedural memory for automatic skills like how to ride a bike Our implicit memory also includes classically conditioned associations among stimuli Without conscious effort we automatically process information about space, time, and frequency *

12 Building memories Space- while studying you often encode the place on a page or in your notebook where certain material appears; later when needing to retrieve the information you may visualize where it was on the page Time- while going about your day, you unintentionally note the sequence of its events; later in the day if you realize you lost something, you may retrace your steps to try and find it Frequency- you effortlessly keep track of how many times things happen, as when you suddenly realize this is the third time you have run into someone today *

13 Building memories Because we have a two track mind, we can use one track to focus on automatic, routine things, and use the other to focus on conscious, effortful processing When you see words in your native language on the side of a truck, you automatically read them and retrieve their meaning Learning to read was not automatic *

14 Building memories .citamotua emoceb nac gnissecorp luftroffe
At first, reading this takes effort, but with practice you can start to perform the task almost automatically We often must use much effort to learn new tasks that we will eventually be able to do automatically *

15 Building memories Sensory memory feeds our active working memory, recording momentary images of scenes or echoes of sounds George Sperling’s studies of sensory memory demonstrated iconic memory A momentary sensory memory of visual stimuli A photographic or picture image memory lasting no more than a few tenths of a second Our visual screen clears quickly, as new images are superimposed over old ones *

16 Building memories We also have an impeccable, though fleeting, memory for auditory stimuli Echoic memory- a momentary sensory memory of auditory stimuli If attention is elsewhere, sounds and words can still be recalled within 3 or 4 seconds When not paying attention in class and the teacher asks what she just said, you can recover the last few words from your mind’s echo chamber *

17 Building memories It is proposed that short term memory can hold about seven information bits It is believed we can recall 7 digits, 6 letters, or 5 words Working memory capacity varies, depending on age and other factors Young adults have more working memory capacity than older adults or children their ability to multitask is relatively greater because they can use their mental workspace more efficiently No matter your age, you do better and more efficient work when focused, without distractions, and on one task at a time *

18 Building memories There are several effortful processing strategies that can boost our ability to form new memories Chunking- organizing items into familiar, manageable units; often occurs automatically Try remembering 43 individual numbers and letters Is this difficult? See if this helps to accomplish this *

19 Building memories Chunking usually occurs so naturally that we take it for granted We can remember information best when we can organize it into personally meaningful arrangements *

20 Building memories Mnemonics- memory aids, especially those techniques that use vivid imagery and organizational devices Vivid imagery is used because we are good at remembering mental pictures We more easily remember concrete, visualizable words than we do abstract words Chunking and mnemonics combined can be great memory aids for unfamiliar material *

21 Building memories In order to remember the colors of the rainbow in order of wavelength? Remember ROY G. BIV We often chunk information into a more familiar form by creating a word from the first letters of the to-be-remembered items called an acronym *

22 Building memories When people develop expertise in an area, they process information in hierarchies Hierarchies are composed of a few broad concepts divided and subdivided into narrower concepts and facts For example, this section of the chapter tries to help you organize some of the memory concepts we have been discussing *

23 Building memories Organizing information into hierarchies helps us retrieve information efficiently Taking class and text notes in outline format may be helpful- this is a form of hierarchical organization *

24 Building memories We retain information better when our encoding is distributed over time Spacing effect- the tendency for distributed study or practice to yield better long term retention than is achieved through massed study or practice Massed practice or cramming can produce speedy short term learning and a feeling of confidence Herman Ebbinghaus once said that those that learn quickly also forget quickly *

25 Building memories Testing effect- enhanced memory after retrieving, rather than simply rereading, information Also called retrieval practice effect or test-enhanced learning Spaced study and self-assessment beat cramming and rereading *

26 Building memories Memory researchers have discovered that we process verbal information at different levels, and that depth of processing affects our long term retention Shallow processing- encoding on a basic level based on the structure or appearance of words May focus on the word’s letters or a word’s sound *

27 Building memories Deep processing- encoding semantically, based on the meaning of the words Tends to yield the best retention The deeper the processing, the better our retention Example on pg *

28 Building memories If new information is not meaningful or related to our experience, we have trouble processing it Example on pg. 325 Asked how well certain adjectives describe someone else, we often forget them; asked how well the adjectives describe us, we remember the words well This is called the self-reference effect *

29 Memory Storage Memory requires brain networks
The network that processes and stores your explicit memories for facts and episodes includes your frontal lobes and hippocampus The left and right frontal lobes process different types of memories Recalling a password and holding it in working memory activates the left frontal lobe Calling up a visual party scene would more likely activate the right frontal lobe *

30 Memory Storage Hippocampus- a neural center located in the limbic system It helps process explicit memories for storage Damage to this region disrupts recall of explicit memories With left-hippocampus damage, people have trouble remembering verbal information but they have no trouble recalling visual designs and locations *

31 Memory Storage Subregions of the hippocampus serve different functions
One region is active as people learn to associate names with faces Another part is active as memory champions engage in spatial mnemonics Memories are not permanently stored in the hippocampus *

32 Memory Storage The hippocampus seems to serve as a loading dock where the brain registers and temporarily holds the elements of a remembered episode Then after a time, the memories are sent somewhere else for storage Sleep supports memory consolidation During deep sleep the hippocampus processes memories for later retrieval *

33 Memory Storage Even if you lose the ability to lay down explicit memories, you can still develop implicit memories for skills and conditioned associations Example on pg. 331 The cerebellum plays a key role in forming and storing implicit memories created by classical conditioning With a damaged cerebellum, a person may not be able to learn certain conditioned reflexes _

34 Memory Storage The basal ganglia are deep brain structures involved in motor movement They facilitate formation of our procedural memories for skills Our implicit memory system helps explain why the reactions and skills we learned during infancy reach far into our future The conscious memory for your first three years of your life are blank though This is called infantile amnesia *

35 Memory Storage There are two possible reasons for infantile amnesia
We index much of our explicit memory suing words that nonspeaking children have not learned The hippocampus is one of the last brain structures to mature *

36 Memory Storage Our emotions trigger stress hormones that influence memory formation Stress hormones provoke the amygdala to initiate a memory trace in the frontal lobes and basal ganglia and to boost activity in the brain’s memory forming areas Emotional arousal can sear certain events into the brain, while disrupting memory for neural events around the same time *

37 Memory Storage Significantly stressful events can form almost unforgettable memories This may be because memory serves to predict the future and to alert us to potential dangers We often times remember exciting or shocking events Flashbulb memories- a clear memory of an emotionally significant moment or event *

38 Memory Storage Our flashbulb memories vivid and we are usually confident in our recollections of them As we relive, rehearse, and discuss the memories over time, we may often combine misinformation with accurate information to the memory *

39 Memory Storage Does the formation of memories impact neural connections? It has been seen in experiments that rapidly stimulating certain memory circuit connections has increased a person’s sensitivity for hours or even weeks to come The sending neuron now needs less prompting to release its neurotransmitter, and more connections exist between neurons *

40 Memory Storage Long-term potentiation- an increase in a cell’s firing potential after brief, rapid stimulation Believed to be a basis for learning and memory After long term potentiation has occurred, passing an electric current through the brain wont disrupt old memories The current will wipe out very recent memories A blow to the head can do the same thing Football players or boxers usually have no memory of events immediately before getting knocked out from a blow to the head *

41 Memory Storage The reason the new memories are lost is that the working memory did not have time to consolidate the information into long term memory *

42 Retrieval There are three measures of retention
Recall- a measure of memory in which the person must retrieve information learned earlier, as on a fill in the blank test Recognition- a measure of memory in which the person need only identify items previously learned, as on a multiple choice test Relearning- a measure of memory that assesses the amount of time saved when learning material again *

43 Retrieval Long after you cannot recall most of the people in your high school graduating class, you may still be able to recognize their yearbook pictures from a photographic lineup and pick their names from a list of names Our recognition memory is quick and vast Our speed at relearning reveals memory *

44 Retrieval Ebbinghaus studied relearning in his learning experiments
His studies showed that the more frequently he repeated a list of syllables on day 1, the fewer repetitions he required to relearn the list on day 2 Additional rehearsal of verbal information increases retention, especially when practice was distributed over time His studies emphasized the point that we remember more than we recall *

45 Retrieval Memories are held in storage by a web of associations, each piece of information interconnected with others When you encode the name of the person sitting next to you in class, you associate with it other bits of information about your surroundings, mood, seating position, and so on These bits are called retrieval cues and they help us to retrieve information later on The more retrieval cues you have the easier it is to bring a memory out of storage *

46 Retrieval The best retrieval cues come from associations we form at the time we encode a memory- smells, tastes, and sights that can evoke our memory of the associated person or event To call up visual cues when trying to recall something, we may mentally place ourselves in the original context *

47 Retrieval Our associations are often activated without our awareness
Priming- the activation, often unconsciously, of particular associations in memory If, walking down a hallway, you see a poster of a missing child, you may then unconsciously be primed to interpret an ambiguous adult-child interaction as a possible kidnapping Putting yourself back in the context where you experienced something can prime memory retrieval *

48 Retrieval What we learn in one psychological state may be more easily recalled when we are again in that state What people learn when sad they don’t recall well in any state but instead they recall it slightly better when sad again Emotions that accompany good or bad events become retrieval cues *

49 Retrieval mood congruent- the tendency to recall experiences that are consistent with one’s current good or bad mood If you’ve had a bad night your gloomy mood may bring back other bad times This retrieval effect helps explain why our moods persist When happy, we recall happy events and therefore see the world as a happy place, which helps prolong our good mood *

50 Retrieval Serial position effect- our tendency to recall best the last and first items in a list The last refers to the recency effect The first refers to the primacy effect Why do you remember the first so well? Why do you remember the last so well? Which one are we more likely to remember even after a delay? *

51 Forgetting For some memory loss is severe and permanent
Anterograde amnesia- an inability to form new memories Can recall your past, but you cannot from new memories Retrograde amnesia- an inability to retrieve information from one’s past *

52 Forgetting Much of what we sense we never notice, and what we fail to encode we will never remember Age can effect encoding efficiency The brain areas that jump into action when young adults encode new information are less responsive in older adults This slower encoding helps explain age related memory decline *

53 Forgetting Even after encoding something well, we sometimes later forget it Ebbinghaus developed a forgetting curve His curve describes how the course of forgetting is initially rapid, then levels off with time One explanation for these forgetting curves is a gradual fading of the physical memory trace *

54 Forgetting Sometimes forgetting is not memories faded but memories unretrieved We store into long term memory whats important to us or what we’ve rehearsed Sometimes important events defy our attempts to access them Retrieval problems contribute to the occasional memory failures of older adults, who more frequently are frustrated by tip of the tongue forgetting *

55 Forgetting As you collect more and more information, your long term memory does not get full but it does get cluttered The clutter can interfere with remembering new or old information Proactive interference- the disruptive effect of prior learning on the recall of new information Your well rehearsed facebook password may interfere with your retrieval of your newly learned twitter password *

56 Forgetting Retroactive interference- the disruptive effect of new learning on the recall of old information If someone sings new lyrics to the tune of an old song, you may have trouble remembering the original words Information presented in the hour before sleep is protected from retroactive interference because the opportunity for interfering events is minimized *

57 Forgetting The hour before sleep is a good time to commit information to memory The information presented in the seconds just before sleep is seldom remembered Sometimes previously learned information(Latin) facilitates our learning of new information(French) Called positive transfer *

58 Forgetting Memories often fail us because they are merely unreliable, self-serving historians Sigmund Freud argues that our memory system self-censors information Repress- the basic defense mechanism that banishes from consciousness anxiety-arousing thoughts, feelings, and memories He believed the repressed thoughts could later be retrieved through therapy Researchers today think repression rarely occurs People can forget unwanted neutral information, but we have a hard time forgetting emotional events *

59 Memory construction errors
Memory is not precise We infer our past from stored information plus what we later imagined, expected, saw and heard We don’t just retrieve memories, we reweave them The way someone words a question about an event can impact your memory When asked about a car accident you witnessed, people tended to say the car was going faster when asked how fast it was going when it crashed into the other car instead of it bumping into the other car *

60 Memory construction errors
Misinformation effect- incorporating misleading information into one’s memory of an event So powerful is the misinformation effect that it can influence later attitudes and behaviors Just hearing a vivid retelling of an event can implant false memories Repeatedly imagining nonexistent actions and events can create false memories *

61 Memory construction errors
Among the frailest parts of memory is its source We may recognize someone but have no idea where we have seen the person We may dream an event and later be unsure whether it really happened Source amnesia- attributing to the wrong source an event we have experienced, hear about, read about, or imagined Also called source misattribution *

62 Memory construction errors
Misattribution is at the heart of most false memories It can happen when you hear someone tell you a story about you and you put that story into your own memory as if you remember it happening it yourself Source amnesia helps explain déjà vu That eerie sense that “I’ve experienced this before” Cues from the current situation may unconsciously trigger retrieval of an earlier experience *

63 Memory construction errors
The key to déjà vu is familiarity with a stimulus without a clear idea of where we encountered it before We experience a feeling of familiarity before we consciously remember details When these functions are out of sync, we may experience a feeling of familiarity without conscious recall *

64 Extra ideas to know Elaborative rehearsal- a memory technique that involves thinking about the meaning of the term to be remembered, as opposed to simply repeating the word to yourself over and over. Maintenance rehearsal- the process of repeatedly verbalizing or thinking about a piece of information. Your short term memory is able to hold information about about 20 seconds. However, this time can be increased to about 30 seconds by using Maintenance Rehearsal. Semantic memory- a more structured record of facts, meanings, conceptsand knowledge about the external world that we have acquired. It refers to general factual knowledge, shared with others and independent of personal experience and of thespatial/temporal context in which it was acquired.

65 Memory construction errors
Episodic memory- represents our memory of experiences and specific events in time in a serial form, from which we can reconstruct the actual events that took place at any given point in our lives. It is the memory of autobiographical events (times, places, associated emotions and other contextual knowledge) that can be explicitly stated. Procedural memory- a type of long-term memory of how to perform different actions and skills. Essentially, it is the memory of how to do certain things. Riding a bike, tying your shoes and cooking an omelet are all examples of procedural memories.

66 Memory construction errors
Decay- refers to the loss of memory over time Eidetic memory- also known as photographic memory, is the ability to recall with vivid accuracy things that have been heard, seen or read. This appears more frequently in children than in adults, and usually involves visual images such as artistic illustrations. A higher level of ACTH is found to be linked with flashbulb memories

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