Memory Flashcards

Question

The sensory register

Answer 1

Environmental stimuli received through the senses enters the SR, which is a short duration store retaining unprocessed impressions of information received through the senses. It has a separate sensory store for each sensory input. The capacity of the SR is unlimited but the duration is only 250 miliseconds. A small fraction of the information received by the SR is attended to and selected for further processing in STM. If not attended to, sensory information is lost due to decay.

Answer 2

If information in the SR is attended to it is acoustically coded into STM. STM is a temporary store for information received from the SR before it is transferred to LTM. Information may be recalled at this point and then forgotten before it is transferred to LTM. STM has a limited capacity of 7 (+/-2) pieces of information so information can be displaced by new incoming information. STM has a duration of 18-30 seconds. This means that without rehearsal information will decay very quickly. Information can be kept in STM by: - maintenance rehearsal (repeatedly verbalising or thinking about the information). This is known as a rehearsal loop. - elaborative rehearsal, (where information is organised in a meaningful way) - the information may then be transferred to LTM for more permanent storage.

Answer 3

If information is sufficiently rehearsed in STM then it is semantically coded into LTM. This is a permanent store holding vast amounts of information for long periods of time. The capacity of LTM is potentially infinite and there is no way of accurately measuring it. The duration of LTM could potentially be a lifetime. When information in LTM is needed it is retrieved by STM and then recalled. Sometimes we cannot access information from LTM because of retrieval failure and so we may need retrieval cues to help us access it.

Answer 4

Advantages: - Neurobiological Evidence 1) Scoville attempted to treat a patient he referred to as HM’s epilepsy by removing several brain areas, including his hippocampus. This resulted in the patient being unable to code new long-term memories, although his short-term memory was unaffected. This supports the idea of separate and distinct STM and LTM. Lab experiments: 1) + Murdock (1962) presented participants with a long list of words to be recalled in any order, this was referred to as the free recall experiment. Words at the beginning and the end of the lists were recalled better than those in the middle (serial position effect). Words at the beginning of the list are recalled because they have been constantly rehearsed and transferred to LTM (the primacy effect), while words at the end of the list are recalled because they are still in STM (the recency effect). This supports the idea of separate and distinct STM and LTM Disadvantages: Neurobiological evidence: 1) Shallice and Warrington reported the case study of KF who as a result of a motorbike accident had reduced STM capacity of only one or two digits, yet his LTM was normal. This supports the idea of a separate STM and LTM stores. However, KF had poor STM for verbal tasks but not visual tasks and this suggests that there is more than one type of STM, which contradicts the Multi-Store Model (MSM) of memory. Also, according to the MSM, LTM are retrieved by STM so if STM is damaged it should be difficult to retrieve LTM. However, KF was able to access LTM with out any difficulty. 1) The MSM is over simplified in assuming that there is only one type of STM and one type of LTM. Research studies indicate that there are several types of STM, such as one for verbal information (phonological loop) and another for non-verbal information (visuo-spatial sketchpad). Research also suggests that there are several types of LTM, we have episodic memory for life events, semantic memory for knowledge and facts and procedural memory for motor skills. 2) Baddeley and Hitch claimed that the MSM could not explain the ability to multi-task; if there is only one type of STM then multi-tasking would not be possible. However, this is not true

Answer 5

STM is an active store holding several pieces of information while they are being worked on LTM is the passive store that only holds previously learned material to be used by STM when needed.

Answer 6

drives the whole working memory system and allocates data to the other components, known as slave systems. deals with cognitive tasks such as decision making, reasoning and problem solving. Individuals have a limited attentional capacity, tasks that are automated make less attentional demands on the central executive and so leave us free to perform other tasks. A person who has been driving 10 years will find that driving has become an automated task that does not make as many attentional demands

Answer 7

deals with spoken and written material. It has two sub-components. Phonological Store: - sometimes referred to as the inner ear. It is linked to speech perception and holds information in speech-based form (i.e. spoken words) for 1-2 seconds. Articulatory Loop - sometimes referred to as the inner voice. - linked to speech production and is used to rehearse and store verbal information from the phonological store. This allows for maintenance rehearsal.

Answer 8

stores and processes information in a visual or spatial form. It is used for navigation. sometimes referred to as the inner eye. It has two sub-components. - Visual Cache The visual cache stores visual material about form and colour. - Inner Scribe The inner scribe handles spatial relationships.

Answer 9

Baddeley added another component after as the model needed a general storage component to operate properly. The slave systems only deal with processing and temporary storage of specific types of information, and the central executive has no storage capacity. The episodic buffer is a limited capacity store, integrating information from the central executive, the phonological loop and the visuo-spatial sketchpad, as well as from LTM.

Answer 10

Advantages - Neurobiological Evidence 1) Shallice and Warrington reported the case study of KF who, because of a motorbike accident, had poor Short-Term Memory (STM) for words that were presented verbally but not for words that were presented visually. This suggests that there is more than one type of STM, as the Working Memory Model (WMM) suggests. In particular, it shows that we have a type of STM for verbal tasks (phonological loop) and another for visual (visuo-spatial sketchpad). - Laboratory Experiments 1) Baddeley and Hitch gave participants a dual task. They were asked to complete a reasoning task, which uses the central executive, at the same time as a reading aloud task, which uses the phonological loop. Participants could do both tasks simultaneously very well, supporting the idea of separate components in STM. 2) Baddeley et al gave participants brief visual presentations of lists of words. These words were made up either of short words or long words. Participants were asked to recall the list immediately in the correct order. It was found that participants could recall more short words than long ones. Baddeley called this the word length effect and concluded that it supports the idea that the phonological loop can hold as many items as can be said in 1.5 to 2 seconds rather than being limited by 7 (+/- 2) items as the multi-store model argues. 1) The WMM has practical applications; it has improved understanding of how people learn to read and so helped psychologists to assist those with Dyslexia who can struggle with reading Disadvantages 1) Several psychologists have criticised the WMM because they think the idea of a central executive is vague and untestable. Damasio presented the case of EVR who had a cerebral tumour removed. He had good reasoning skills, which suggested his central executive was intact, but he could not make decisions, which suggests his central executive was damaged. This case study strongly indicates that the central executive is more complicated than the WMM claims.

Answer 11

Episodic Semantic Procedural

Answer 12

Episodic memory is your memory for events Episodic memories have three elements: - specific details of the event - the context of the event -the emotions you were feeling at the time of the event. stored in the hippocampus.

Answer 13

Semantic memory is your memory for facts and general knowledge about the world. Can relate to things such as the functions of an object, what behaviour is appropriate in a certain situation, as well as abstract concepts such as mathematics and language. They begin as episodic memories as we acquire knowledge based on personal experiences. There is a gradual transition from episodic memory to semantic memory when memory slowly loses its association to particular events and is generalised. Sometimes people can have a strong recollection of when and where they learned a particular fact. Semantic memories are stored in the temporal lobe.

Answer 14

Related to motor skills and actions, e.g knowing knowing how to drive or knowing how to read. They are acquired through practise and repetition and seem to be more resistant to forgetting or amnesia than other types of LTM. We are less aware of procedural memories because they have become automatic and are unavailable for conscious inspection (unlike episodic memories and semantic memories) making it difficult to explain them verbally. Often, if you think too much about procedural memories it prevents you from carrying them out. It is important that procedural memories are automatic so that we can focus our attention on other tasks while performing these everyday skills. Procedural memories are stored in the cerebellum.

Answer 15

Advantages 1) Evidence for the distinction between episodic/semantic and procedural memory has come from research on patients with amnesia. Typically patients with amnesia are unable to store new episodic or semantic memories but their procedural memory appears to be largely unaffected. 2) Scientific evidence captured from brain scans supports the view that there are different types of LTM. For example, when asking participants to recall different types of information, different areas of the brain are shown to be active on an fMRI. Episodic memories are associated with the hippocampus, semantic memories are associated with the temporal lobe and procedural memories are associated with the cerebellum. 3) Case studies of brain damaged patients offer support for the different types of LTM. For example, Clive Wearing is a man who suffered from a viral infection which damaged his hippocampus. He has no episodic memory and cannot form new semantic memories. However, his procedural memory is intact (e.g. he can still play the piano). Disadvantages: 1) Research into the different types of LTM have typically been conducted on individual patients (e.g. Clive Wearing and HM). Case studies are highly detailed and provide a lot of information but are isolated cases of one individual. It would be inappropriate to assume that everyone’s’ LTM is formed in the same way. The findings cannot be generalised to the wider population.

Answer 16

used to refer to a person’s loss of ability to recall or recognise something that they have previously learned.

Answer 17

forgetting occurs when two lots of information become confused in memory. It is more likely to occur when the two lots of information are similar to one another. Inference is less likely to occur when there is a gap between the instances of learning. Retroactive interference is when new learning affects the recall of old information. Proactive interference is when old learning affects the recall of new information

Answer 18

Advantages: 1) Underwood (1957) investigated proactive interference. He found that participants who learned ten lists of words could only recall 20% of the words from the first list the next day. Participants who learned one list of words recalled over 70% of the words the next day. 2) McGeoch and McDonald (1931) demonstrated retroactive interference. They gave participants lists of words that they had to learn until they could recall them with 100% accuracy. Participants then learned a new list. This new list was either synonyms (words with similar meanings to the words on the original list) or antonyms (words unrelated to the original list). Participants were then asked to remember the original list. Participants given the list of synonyms had the worst recall. Learning two lists of words that have the same meaning would cause interference. 3) This theory has practical applications. Students should be made aware of this theory so that they do not attempt to revise similar content/subjects at the same time, as this will make interference more likely to occur. Disadvantages: 1) When interference occurs the loss of information may only be temporary, therefore interference is not a true explanation for forgetting because the information is not actually over-written and is still in Long-Term Memory. 2) Some psychologists argue that retrieval failure is a much better explanation of forgetting in everyday life than interference. This theory states that we forget when there are not enough retrieval cues to help us remember. Godden and Baddeley got divers to learn and recall word lists on either dry land or underwater. Results showed that words learnt and recalled in the same context were better remembered as there were retrieval cues in the environment to help them remember the words.

Answer 19

forgetting occurs in the absence of appropriate retrieval cues. When information is initially placed in memory, data associated with this information is stored at the same time. If these retrieval cues are not available at the time of recall, it may make it appear as if you have forgotten the information when in fact you just cannot access it at that time. Some retrieval cues are linked to the material that needs to be remembered in a meaningful way, for example, the anagram ‘STM’ may lead people to recall all sorts of information about short-term memory. Other retrieval cues are coded at the same time of learning but not in a meaningful way.

Answer 20

The environment in which material is learnt can act as a retrieval cues. This means that if you recall information in the same environment that you learned it then your recall will be better. If you are not in the same context at retrieval as you were at coding then forgetting can occur.

Answer 21

An individual’s physical state (e.g. mood) can affect their recall. Research studies suggest that recall is facilitated if people have a similar physical state at recall as when the information was coded. If you are not in the same physical state at recall as you were when you learned the information then you might fail to access the information.

Answer 22

Advantages 1) Abernethy demonstrated the importance of context-dependent cues. They tested participants’ recall using a mixture of familiar and unfamiliar instructors and teaching rooms. Participants tested by a familiar instructor, in a familiar room, performed the best because the instructor and room acted as retrieval cues. 2) Godden and Baddeley demonstrated the importance of context- dependent cues. They asked divers to learn and recall word lists on either dry land or underwater. Results showed that words learnt and recalled in the same context were better remembered as there were retrieval cues to help them remember the words. 3) Darley et al. showed the importance of state-dependent cues. They found that participants who hid money in a large warehouse while under the influence of cannabis were more likely to recall the hiding place when in a similar drugged state. 4) Retrieval Failure has practical applications. Whenever possible students should learn/revise in the room, in which they will take their final exams. Disadvantages: 1) Baddeley argues that the influence of retrieval cues is not actually very strong. In real life, we often recall something in a different context to where we learnt it. For instance, students do not often take their GCSE examinations in the classroom where they learned the information they need for that exam.

Answer 23

the evidence supplied to a court by people who have seen a crime, based on their memory of the incident. This evidence can include an identification of the perpetrator or details of the crime Juries are often heavily influenced by eyewitnesses.

Answer 24

questions that are phrased in such a way as to encourage a witness to give a certain answer. The response-bias explanation argues that leading questions do not affect memory, merely the answer a person chooses to give. the substitution-bias explanation proposes that leading questions distort memories because they contain misleading information.

Answer 25

Procedure: showed 45 American students a film of a car crash and then asked them to estimate the speed that the cars were travelling when they crashed. different verbs were used in the question depending on the condition. The verbs were contacted, hit, bumped, collided, or smashed. Findings: Participants in the ‘contacted’ condition estimated the speed as 31mph but in the ‘smashed’ condition participants estimated the speed as 41mph. A week later participants were asked if they saw any broken glass, even though there was no broken glass shown in the film. 32% of the participants in the ‘smashed’ condition reported seeing broken glass compared to only 12% in the control condition. This shows that leading questions have a significant impact on what people recall and can change a person’s entire memory of an event.

Answer 26

Advantages 1) This study is a laboratory experiment and was therefore highly controlled. This reduces the chance of extraneous variables, increasing the validity of the results. Furthermore, it is easy for psychologists to replicate their research study to see if the same results are found, meaning the study is reliable. Disadvantages: 1) This study has questionable ecological validity. The participants watched a video of a car crash. People who witness a real car accident, who have a stronger emotionally connection to the event, may not be as susceptible to leading questions. 2) This study also lacks population validity. The study consisted of 45 American students. Students are less experienced drivers may be less competent at estimating speeds. Consequently, we are unable to generalise the results of this study to other populations. Older and more experienced drivers may be more accurate in their judgement of speeds and therefore less susceptible to leading questions.

Answer 27

The memory of an event can be contaminated through discussing events with others due to misinformation (memory contamination). A desire for social approval can lead co-witnesses to reach a consensus view of what happened (memory conformity).

Answer 28

Procedure: put participants in pairs and got them to watch a different video of the same event so that they each got unique details. In one condition the pairs were encouraged to discuss the event with one another before individually recalling the event. In the other condition they did not discuss what they had seen with one another. Findings: 71% of witnesses who had discussed the event went on to mistakenly recall details that they could not have seen themselves, but that they had learned of during the discussion with their partner.

Answer 29

Advantages 1) This study has population validity. Two different populations, students and older adults, were compared and there were no significant differences between these two groups. This allows us to conclude that post-event discussion affects younger and older adults in a similar way. Disadvantages 1) This study lacks ecological validity. The participants knew they were taking part in an experiment and they therefore are more likely to have paid close attention to the details of the video clip. The results do not reflect real life where witnesses may be exposed to less information.

Answer 30

DEFINITION : state of apprehension, uncertainty, and fear resulting from a threatening situation. When anxiety is high it can impair both physical and psychological functioning. Several psychologists have suggested that the anxiety that occurs when witnessing a crime can prevent accurate and detailed recall of that crime. The presence of a weapon during a crime increases anxiety and therefore could impair witnesses’ memory of the crime. People who observe a violent crime will often pay attention to the aspect of the situation posing the most threat to them because of the anxiety these weapons cause. This means that witnesses who see a violent crime involving a weapon can often describe a criminal’s weapon in great detail, but they cannot recall much about the criminal themselves. This is called the weapon focus effect.

Answer 31

There were 2 conditions: In the experimental condition: Loftus arranged for participants to overhear a heated and hostile argument between two people. They heard the sounds of furniture being overturned and broken glass. Then a man emerged carrying a letter opener covered in blood. control condition: participants overheard a conversation between two people about laboratory equipment failure. A man with grease all over his hands emerged carrying a pen. Participants were then asked to identify the person they had just seen from 50 photos Findings: 33% of the participants in the bloody letter opener condition recognised the photo of the person carrying the letter opener 49% of the participants in the pen condition recognised the photo of the person carrying the pen. Loftus argued that this occurred because people in the experimental condition focused on the bloody letter opener rather than the person carrying it, because the letter opener was a weapon that could pose a threat to them.

Answer 32

Advantages: 1) This study is supported by other research studies. Loftus & Burns allocated participants into one of two conditions. One group watched a violent short film where a boy was shot in the head. The other group watched a non-violent short film of a crime. Participants were less accurate in recall when they saw the short film with a gun than those who watched the non-violent movie. Disadvantages 1) Loftus study lacks ecological validity. Although they were waiting in the reception area outside of the laboratory, they may have anticipated that something was going to happen, which could have affected the accuracy of their judgements and the validity of the study. 2) Loftus study violated many ethical guidelines. The participants were deceived about the nature of the experiment and were not protected from psychological harm. They were exposed to a man who they were led to believe had just killed someone, holding a bloodied knife, which could have caused them extreme distress. Participants may have left the experiment feeling exceptionally stressed, especially if they, or someone they knew, had been involved in knife crime. 3) Yuille and Cutshall investigated the effect of anxiety in a real life shooting, in which one person was killed and another person seriously wounded. 21 witnesses were originally interviewed by investigating police and 13 of these witnesses agreed to take part in a follow-up interview five months later. The witnesses were accurate in their eyewitness accounts five months later and little change was found in their testimony. Those who had been most distressed at the time of the shooting gave the most accurate account. In real life cases leading questions and anxiety do not affect the accuracy of eyewitness testimony the same way they do in the laboratory. 4) There are individual differences in how anxiety affects memory. Some people actually have better recall when they are anxious. Christianson and Hubinette conducted a research study using 110 real life eyewitnesses who had witnessed one of 22 bank robberies. Some were onlookers and some were bank clerks who had been directly threatened by the robbers. It was found that victims were more accurate than onlookers in their description of the bank robbers.

Answer 33

Fisher et al. studied police interviews over a four-month period and found that questions were brief, direct, fact based and closed. Witnesses were often interrupted and not allowed to expand upon their answers. He argued that this might be contributing to the failure of eyewitnesses to accurately recall the event they had witnessed.

Answer 34

1) Context Reinstatement: - The witness tries to mentally recreate an image of the situation, including details of the environment (e.g weather, feelings) - this may act as context dependent retrieval cues to improve recall. 2) Report Everything: - Encourage the witness to recall all details about the event - even though they may seem unimportant. -This may highlight details which have been overlooked and trigger other memories. 3) Recall From Changed Perspective - The witness tries to mentally recreate the situation from different points of view. -This promotes a more holistic view of the event which may enhance recall and reduce the influence of schemas. 4) Recall in Reverse Order - The witness is asked to recall the scene in a different chronological order, e.g. from the end to the beginning. - This should verify the accuracy of the witnesses' account and reduce the possibility that recall may be influenced by schemas

Answer 35

Fisher added additional guidelines for interviews including: - Encourage the witness to relax and speak slowly - this reduces anxiety and may enhance recall - Avoid distractions. - Use open-ended questions. - Offer comments to help clarify witness statements - may improve detail

Answer 36

Advantages: 1) Geiselman et al. showed participants a video of a simulated crime and tested recall using the cognitive interview, standard interview or hypnosis. The cognitive interview led to the most information being recalled by the eyewitnesses. 2) Fisher et al. trained real police officers in Miami to use the enhanced cognitive interview when interviewing eyewitnesses. They found that on average there was a 46% increase in the amount of information witnesses gave. 90% of the information that could be verified was accurate. Disadvantages: 1) Koehnken et al. found that witnesses recalled more incorrect information when interviewed with the cognitive interview compared to the standard interview technique, perhaps because more detailed recall increases the chance of making a mistake. 2) The cognitive interview is time consuming to implement and police officers often do not have the time, training and resources to use it. 3) Memon et al. reported that police officers believed that Recall From Changed Perspective stage of the cognitive interview misleads witnesses into speculating about the event they witnessed rather than reporting what they actually saw. For this reason the police were reluctant to use it.