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Cicc4e06 finalppt-140506123005-phpapp01
1.
psychologypsychology fourth editionfourth edition Copyright
©2015, 2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Fourth Edition Saundra K. Ciccarelli • J. Noland White Chapter 6 memory
2.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Learning Objectives 6.1 What are the three processes of memory and the different models of how memory works? 6.2 How does sensory memory work? 6.3 What is short-term memory, and how does it differ from working memory? 6.4 How is long-term memory different from other types of memory? 6.5 What are the various types of long-term memory, and how is information stored in long-term memory organized? 6.6 What kinds of cues help people remember? 6.7 How do the retrieval processes of recall and recognition differ, and how reliable are our memories of events? 6.8 How are long-term memories formed, and how can this process lead to inaccuracies in memory? 6.9 What is false-memory syndrome? 6.10 Why do we forget? 6.11 How and where are memories formed in the brain? 6.12 How does amnesia occur? 6.13 How do sleep, exercise, and diet affect memory?
3.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Memory and Its Processes • Memory: an active system that receives information from the senses, organizes and alters that information as it stores it away, and then retrieves the information from storage LO 6.1 Memory and the Three Processes of Memory
4.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Memory and Its Processes • Processes of memory – encoding: the set of mental operations that people perform on sensory information to convert that information into a form that is usable in the brain’s storage systems – storage: holding onto information for some period of time – retrieval: getting information that is in storage into a form that can be used LO 6.1 Memory and the Three Processes of Memory
5.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Models of Memory • Information-processing model: assumes that the processing of information for memory storage is similar to the way a computer processes memory—in a series of three stages • Parallel distributed processing (PDP) model: memory processes are proposed to take place at the same time over a large network of neural connections LO 6.1 Memory and the Three Processes of Memory
6.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Models of Memory • Levels-of-processing model: assumes that information that is more “deeply processed”—or processed according to its meaning, rather than just the sound or physical characteristics of the word or words—will be remembered more efficiently and for a longer period of time LO 6.1 Memory and the Three Processes of Memory
7.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.1 Three-Stage Process of Memory Information enters through the sensory system, briefly registering in sensory memory. Selective attention filters the information into short-term memory, where it is held while attention (rehearsal) continues. If the information receives enough rehearsal (maintenance or elaborative), it will enter and be stored in long-term memory.
8.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Sensory Memory • Sensory memory: the very first stage of memory – the point at which information enters the nervous system through the sensory systems LO 6.2 Sensory Memory
9.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.2 Iconic Memory Test Sample grid of letters for Sperling’s test of iconic memory. To determine if the entire grid existed in iconic memory, Sperling sounded a tone associated with each row after the grid’s presentation. Participants were able to recall the letters in the row for which they heard the tone. The graph shows the decrease in the number of letters recalled as the delay in presenting the tone increased.
10.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Sensory Memory • Iconic memory: visual sensory memory, lasting only a fraction of a second – capacity: everything that can be seen at one time – duration: information that has just entered iconic memory will be pushed out very quickly by new information, a process called masking • Eidetic imagery: the (rare) ability to access a visual memory for thirty seconds or more LO 6.2 Sensory Memory
11.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Sensory Memory • Echoic memory: the brief memory of something a person has just heard – capacity: limited to what can be heard at any one moment; smaller than the capacity of iconic memory – duration: lasts longer than iconic; about two to four seconds LO 6.2 Sensory Memory
12.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Short-Term Memory • Short-term memory (STM; working memory): the memory system in which information is held for brief periods of time while being used – selective attention: the ability to focus on only one stimulus from among all sensory input LO 6.3 Short-Term or Working Memory
13.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Short-Term Memory • Digit-span test: a series of numbers is read to subjects who are then asked to recall the numbers in order – conclusion: capacity of STM is about seven items or pieces of information, plus or minus two items—or from five to nine bits of information. – “magical number” = 7 LO 6.3 Short-Term or Working Memory
14.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Short-Term Memory • Chunking: bits of information are combined into meaningful units, or chunks, so that more information can be held in STM • Maintenance rehearsal: saying bits of information to be remembered over and over in one’s head in order to maintain it in short-term memory (STMs tend to be encoded in auditory form) LO 6.3 Short-Term or Working Memory
15.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.3 Digit-Span Test Instructions for the digit-span test: Listen carefully as the instructor reads each string of numbers out loud. As soon as each string is ended (the instructor may say “go”), write down the numbers in the exact order in which they were given.
16.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Short-Term Memory • STM lasts from about twelve to thirty seconds without rehearsal • STM is susceptible to interference – e.g., if counting is interrupted, one will have to start over LO 6.3 Short-Term or Working Memory
17.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Long-Term Memory • Long-term memory (LTM): the memory system into which all the information is placed to be kept more or less permanently • Elaborative rehearsal: a method of transferring information from STM into LTM by making that information meaningful in some way LO 6.4 Long-Term Memory
18.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Types of LTM • Nondeclarative (implicit) memory: type of long-term memory including memory for skills, procedures, habits, and conditioned responses – these memories are not conscious, but their existence is implied because they affect conscious behavior – also include emotional associations, habits, and simple conditioned reflexes that may or may not be in conscious awareness LO 6.5 Different Types of Long-Term Memory
19.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Nondeclarative (Implicit) LTM • Procedural memory (often called implicit memory): memory that is not easily brought into conscious awareness • Anterograde amnesia: loss of memory from the point of injury or trauma forward, or the inability to form new long-term memories – usually does NOT affect procedural LTM LO 6.5 Different Types of Long-Term Memory
20.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.4 Tower of Hanoi The Tower of Hanoi is a puzzle that is solved in a series of steps by moving one disk at a time. The goal is to move all of the disks from peg A to peg C; the rules are that a larger disk can not be moved on top of a smaller one and a disk can not be moved if there are other disks on top of it. Amnesia patients were able to learn the procedure for solving the puzzle but could not remember that they knew how to solve it.
21.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Types of LTM • Declarative (explicit) memory: type of long- term memory containing information that is conscious and known – memory for facts LO 6.5 Different Types of Long-Term Memory
22.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Declarative (Explicit) LTM • All the things that people know • Semantic memory: declarative memory containing general knowledge – knowledge of language, information learned in formal education • Episodic memory: declarative memory containing personal information not readily available to others – daily activities and events LO 6.5 Different Types of Long-Term Memory
23.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Declarative (Explicit) LTM • Semantic and episodic memories are forms of explicit memory—memory that is consciously known. LO 6.5 Different Types of Long-Term Memory
24.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.5 Types of Long-Term Memories Long-term memory can be divided into declarative memories, which are factual and typically conscious (explicit) memories, and nondeclarative memories, which are skills, habits, and conditioned responses that are typically unconscious (implicit). Declarative memories are further divided into episodic memories (personal experiences) and semantic memories (general knowledge).
25.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Organization of Memory • LTM is organized in terms of related meanings and concepts • Semantic network model: assumes that information is stored in the brain in a connected fashion – concepts that are related stored physically closer to each other than to unrelated concepts LO 6.5 Different Types of Long-Term Memory
26.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.6 An Example of a Semantic Network In the semantic network model of memory, concepts that are related in meaning are thought to be stored physically near each other in the brain. In this example, canary and ostrich are stored near the concept node for “bird,” whereas shark and salmon are stored near “fish.” But the fact that a canary is yellow is stored directly with that concept.
27.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Cues to Help Remember • Retrieval cue: stimulus for remembering • Priming can occur where experience with information or concepts can improve later performance • Encoding specificity: tendency for memory of information to be improved if related information (e.g., surroundings or physiological state) available when the memory was first formed is also available when the memory is being retrieved LO 6.6 Kinds of Cues that Help People Remember
28.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Cues to Help Remember • Encoding Specificity – state-dependent learning: memories formed during a particular physiological or psychological state will be easier to recall while in a similar state LO 6.6 Kinds of Cues that Help People Remember
29.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Recall • Recall: memory retrieval in which the information to be retrieved must be “pulled” from memory with very few external cues • Retrieval failure: recall has failed (at least temporarily) – tip of the tongue (TOT) phenomenon LO 6.7 How Recall and Recognition Differ
30.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Recall • Serial position effect: information at the beginning and the end of a body of information more accurately remembered than the information in the middle – primacy effect: tendency to remember information at the beginning of a body of information better than what follows – recency effect: tendency to remember information at the end of a body of information better than the information ahead of it LO 6.7 How Recall and Recognition Differ
31.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White effect), because the beginning information receives more rehearsal and may enter LTM. Information at the end of a list is also retrieved at a higher rate (recency effect), because the end of the list is still in STM, with no information coming after it to interfere with retrieval.
32.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Recognition • Recognition: ability to match a piece of information or a stimulus to a stored image or fact • False positive: error of recognition in which people think that they recognize a stimulus that is not actually in memory – case of Father Bernard Pagano falsely identified by seven witnesses; another man later confessed to the crimes LO 6.7 How Recall and Recognition Differ
33.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Eyewitness Testimony • Elizabeth Loftus – showed that what people see and hear about an event after the fact can easily affect the accuracy of their memories of that event – demonstrated that eyewitness testimony is not always reliable LO 6.7 How Recall and Recognition Differ
34.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Automatic Encoding and Flashbulb Memories • Automatic encoding: tendency of certain kinds of information to enter long-term memory with little or no effortful encoding • Flashbulb memories: automatic encoding that occurs because an unexpected event has strong emotional associations for the person remembering it LO 6.7 How Recall and Recognition Differ
35.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White How LTMs Are Formed • Constructive processing: memory retrieval process in which memories are “built,” or reconstructed, from information stored during encoding – with each retrieval, memories may be altered, revised, or influenced by newer information LO 6.8 How Long-Term Memories Are Formed
36.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White How LTMs Are Formed • Hindsight bias: the tendency to falsely believe, through revision of older memories to include newer information, that one could have correctly predicted the outcome of an event – “Monday morning quarterbacking” LO 6.8 How Long-Term Memories Are Formed
37.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Memory Retrieval Problems • Misinformation effect: tendency of misleading information presented after an event to alter the memories of the event itself LO 6.8 How Long-Term Memories Are Formed
38.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Reliability of Memory Retrieval • False memory syndrome: creation of inaccurate or false memories through the suggestion of others, often while the person is under hypnosis • Evidence suggests that false memories cannot be created for just any kind of memory – memories must at least be plausible. LO 6.9 False Memory Syndrome
39.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Forgetting: Ebbinghaus • Curve of forgetting: a graph showing a distinct pattern in which forgetting is very fast within the first hour after learning a list and then tapers off gradually – distributed practice: spacing one’s study sessions produces better retrieval – massed practice: studying a complete body of information all at once LO 6.10 Why Do We Forget?
40.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.9 Curve of Forgetting Ebbinghaus found that his recall of words from his memorized word lists was greatest immediately after learning the list but rapidly decreased within the first hour. After the first hour, forgetting leveled off.
41.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Forgetting: Encoding Failure • Encoding failure: failure to process information into memory LO 6.10 Why Do We Forget? Figure 6.9 Stop! Many people look at stop signs multiple times a day. Which of these stop signs is closest to an actual stop sign? (The answer can be found in the notes section of this slide.)
42.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Forgetting: Memory Trace Theory • Memory trace: physical change in the brain that occurs when a memory is formed – decay: loss of memory due to the passage of time, during which the memory trace is not used – disuse: another name for decay, assuming that memories that are not used will eventually decay and disappear – memories recalled after many years are not explained by memory trace theory LO 6.10 Why Do We Forget? t
43.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Forgetting: Interference Theory • Proactive interference: memory retrieval problem that occurs when older information prevents or interferes with the retrieval of newer information • Retroactive interference: memory retrieval problem that occurs when newer information prevents or interferes with the retrieval of older information LO Why Do We Forget?
44.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 6.10 Proactive and Retroactive Interference If a student were to study for a French exam and then a Spanish exam, interference could occur in two directions. When taking the Spanish exam, the French information studied first may proactively interfere with the learning of the new Spanish information. But when taking the French exam, the more recently studied Spanish information may retroactively interfere with the retrieval of the French information.
45.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White
46.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Formation of LTMs • Consolidation: changes that take place in the structure and functioning of neurons when a memory is formed – long-term potentiation: changes in number and sensitivity of receptor sites/synapses through repeated stimulation • Hippocampus: area of brain responsible for the formation of LTMs – see the case of H.M. LO 6.11 How and Where Memories Are Formed in the Brain
47.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Amnesia • Retrograde amnesia: loss of memory from the point of some injury or trauma backwards, or loss of memory for the past • Anterograde amnesia: loss of memory from the point of injury or trauma forward, or the inability to form new long-term memories – “senile dementia” – the case of H.M. LO 6.12 How Does Amnesia Occur?
48.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Alzheimer’s Disease • 5.3 million cases in U.S. • Primary memory difficulty in Alzheimer’s is anterograde amnesia – retrograde amnesia can also occur as the disease progresses • There are various drugs in use or in development for use in slowing or stopping the progression of Alzheimer’s disease, but no cure. LO 6.12 How Does Amnesia Occur?
49.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Alzheimer’s Disease • Risk factors include – high cholesterol – high blood pressure – smoking – obesity – Type II diabetes – lack of exercise LO 6.12 How Does Amnesia Occur?
50.
Copyright © 2015,
2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Amnesia • Infantile amnesia: the inability to retrieve memories from much before age three – autobiographical memory: the memory for events and facts related to one’s personal life story (usually after age three) LO 6.12 How Does Amnesia Occur?
51.
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2012, 2008 by Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Health and Memory • Sleep is important in forming memories – memories rehearsed during sleep as well as during waking are more likely to be consolidated – one can’t learn something new while sleeping, but new information can be better consolidated while sleeping – sleep deprivation severely interferes with hippocampal function and memory • Even brief exercise can be good for your memory • Fish is brain food? – omega-3 fatty acid called DHA (docosahexaenoic acid) appears to help memory cells communicate LO 6.13 How Do Sleep, Exercise, and Diet Affect Memory?
Editor's Notes
The answer to Figure 6.9 is the middle right image.
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