РефератыИностранный языкDoDo Flashbulb Memories Differ Essay Research Paper

Do Flashbulb Memories Differ Essay Research Paper

Do Flashbulb Memories Differ Essay, Research Paper


?Our past is preserved in a variety of


memories of very different nature? (Salaman, 1970)


There are many proposed divisions and


sub-divisions of human memory, such as working memory, procedural memory,


semantic memory or episodic memory. Many of the systems seem to overlap, with


each having varying functions related to the maintenance of what is essentially


human life. For example, episodic and autobiographical memory fundamentally


share the same functions. One of the many functions is what Tulving (1983)


called ?Mental time travel?, the ability to experience past event.


Autobiographical memories are thought to be structured at different levels of


temporal and spatial specificity that together are used as reference for the


construction of ?self?. This mental time travel can take place through


different hierarchic levels of autobiographical organisation. The hierarchy


level can be as general as ?university? or as specific as remembering the topic


of conversation with a certain person on a certain day (Cohen, 1998).


Autobiographical memories are therefore seen as being autonoetic in that they


carry information about the context in which they were experienced. One


example of an extreme form of contextual specific memory is the death of


Princess Diana. Many people especially the media ask a common question such as


?what were you doing when you heard the news?. Many people claim to be able to


remember such major moments with unusual clarity and vividness, as if the


events were etched on their minds throughout their lives. The question is


whether these ?flashbulb memories? are functionally different to all other


types of memory such as autobiographical memory.Brown & Kulik (1977), introduced the term


flashbulb memory to describe memories that are preserved in an almost


indiscriminate way. They postulated that these flashbulb memories were indeed


different from ordinary memories, with some defining characteristics. Although


these memories are thought to be photographic in their clarity and detail, they


do not preserve all features of an event. Conversely Brown & Kulik proposed


that idiosyncratic event details are remembered. These details help form what


has been described as a ?live? memory in that the ?reception field? is


remembered including ?where?, ?when? and ?who with? factors of an event. Brown


& Kulik (1977) studied memories for important events such as the death of


John F Kennedy. They found that irrelevant details were often recalled and it


appeared that they had retained ?a brief moment of time associated with an


emotional event? (Smyth et al, 1994). Brown & Kulik suggested that


flashbulb memories are formed by the activity of an ancient brain mechanism


evolved to capture emotional and cognitive information relevant to the survival


of an individual or group. To summarise, flashbulb memories FMs are


thought to be an unique survival mechanism distinct from other form of memory


in their clarity, longevity and attention to idiosyncratic detail. These characteristics of flashbulb memories


can be mapped onto issues concerning memory. As with many memory systems, the


argument over the distinctiveness of flashbulb memories involves encoding,


storage and retrieval. These issues


relate to many issues within Flashbulb memory such as their formation,


accuracy, consistency and longevity. It appears that these processes are


interrelated with each process being dependent on another. In terms of FM formation, Brown & Kulik


thought that the clarity and detail of FMs is correlated with the emotion,


surprise and personal consequentiallity of the event. They also thought that


surprise initiates FM formation, while personal consequentiallity determines


the elaborateness of the resulting FM. As support for this they found that more


blacks had FMs associated with the death of Martin Luther King compared to


whites. Apparently this was due to an increased emotional personal


consequentiallity felt their part of society.


Therefore self referring prior knowledge of surprising important events


is thought to support privileged encoding of FMs compared to other mundane


memories. In support for this Livingstone (1967) proposed that when an event


passes a certain biological criterion, the limbic system discharges into the


reticular system, which further discharges throughout the cortical hemispheres.


This firing above a certain level has been termed the ?now print? mechanism.


This system can be seen as being rather like the flash going off on a camera.


However this view is criticised on the grounds that this ?biological level? is


not specifically identified. In a further criticism Neisser (1982c) has


claimed that FMs are not specially encoded and therefore not unique. Neisser


proposed that FMs were Simply ordinary memories made clearer and longer lasting


by frequent rehearsal after the event. This argument seems quite logical, as


particularly in this global age the media and society frequently replay and


retell events of extreme public attention or emotion. Flashbulb memories could


therefore be seen as memories that have be actively reconstructed to such an


extent that they can be clearly replayed in our minds. Flashbulb memories are


seen by Neisser not as a special evolutionary mechanism, but as a method of


promoting the integration of an individual within a society. In this


reconstruction, personal consequentiallity is applied after an event once is


importance is measured within society. This also questions the validity and accuracy


of ?flashbulb memories? in that they are memories actively reconstructed and


transformed over time. Neisser & Harsch (1992) measured flashbulb memories


of the shuttle challenger explosion. They found that after one day 9 subjects claimed


to have learned of the event from television, however 34 months later this


figure had risen to 19. As a further nail in the coffin for Brown and Kulik’s


flashbulb memory hypothesis Christianson & Loftus (1987) found that high


emotion served to narrow attention to focus to the central aspects of an event


a the expense of peripheral details. This would seem to indicate that the


idiosyncratic details associated with flashbulb memories are more


reconstructive, as the periphery surrounding an event is filled in on


rehearsal. At this point it may appear that flashbulb


memories are little more than a cultural phenomenom involving an enhancement of


ordinary memories and therefore not different from them. McCloskey et al (1988)


have pointed out that ordinary memories can be accurate and long lasting due to


frequent rehearsal. FMs are therefore may be ordinary memories retained to some


unusually high standard of clarity.However there has been a considerable


backlash in support of uniqueness of flashbulb memories. Various researchers


have pointed to the fact that personal consequentiallity was not measured within either the


challenger or other such studies. As already demonstrated by Brown and Kulik


(1977), emotional consequentiallity is a dominant factor in the formation of


FMs as seen in their comparison of FMs for Malcom X between blacks and whites.


In a similar study, Conway (1994) measured FMs of the resignation of Margaret


Thatcher. Conway took measures immediately and around 9 months. Conway found that


over 86% of British subjects had complete and accurate memories fitting the


description of FMs. Conversely only 29% of non-British subjects had ?FM?


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memories. In a comparison of three studies of important news events such as the


resignation of including his own and the San Francisco earthquake (Neisser,


Winograd, and Weldon, 1991), Conway (1995) concluded that FMs may be mediated


by importance and/or emotion, but not rehersal. Conway used these studies as


support for the idea that encoding is special for flashbulb memorie and that


they are not purely the production of elaborate rehersal. Although Conway found In terms of accuracy of


flashbulb memories. Rehearsal is thought to serve different


functions for different memories. Smyth et al (1994) noted that some memories


successfully remain with us accurately for many years. They furthered that


these extended memories could be distinguished between memories that have used


over a period of time and emotionally charged flashbulb memories. Conway (1995)


suggests that rehearsal may serve to prevent these ordinary memories from


decaying while rehearsal within flashbulb memories acts to elaborate. It may be that ordinary memories require


preventative rehearsal due to their instability. Conway (1995) believed that


most autobiographical memories are unstable and dynamic requiring effortfull


maintenance. Conway & Anderson (1993) believe that ordinary memories are


constructed from different types of autobiographical knowledge and not directly


accessed as in a ?memory unit?. Flashbulb memories however are believed to


represent tightly organised and dense autobiographical knowledge. FMs are


therefore thought to be different to ordinary memories in their specificity of


knowledge and organisation within the brain.have suggested that there are In terms of


accuracy, Conway has pointed to the fact that Brown and Kulik never claimed


that FMs were perfect. Examples of personal FMs, those experienced


solely by individuals support Conway?s arguments of the speciality of encoding


being independent of rehearsal. Christianson and Nilson (1989) site the


unfortunate case of a rape victim who developed amnesia, supposedly motivated


as a removing the event from memory. However the victim was jogging a year


later when a sudden flashbulb memory or flashback was experienced. This was


cued by the victim noticing a similar brick pattern to that seen during the


attack. According to Conway and Brown & Kulik,


the differences between ordinary memory and FMs would be self evident in this


sort of incident. Due to their dense organisation, FMs can be compared to a


tightly wound spring in that they are hollistc.The issue of flashbulb memories being


indellible It appears therefore that FMs may as first


thought have a unique encoding mechanism that is independent of rehearsal.


Pilemer et al (1988) ? emotionIn conclusion, the distinction between FMs


and ordinary memories is in clear in places unfortunatly this difference is not


universal. There seems to be a fine line between vivid autobiographical


memories and flashbulb memories. There seems to be many factors influencing


flashbulb memory formation, however these have been broken down primarily to


personal consequentiallity, importance of an event and emotion. Surprise is


thought to be a significant factor that combines with the other three to


promote the ideal conditions for flashbulb memory formation. Conway (1994) has


concluded that during events importance interacts with emotion to form FMs.


Conway?s evaluation does not describe how vivid autobiographical memories may


represent different systems to flashbulb memories. The personal problem I have concerning the


distinctiveness of FMs was encountered recently. Whilst typing an essay, I


experienced an extremely vivid flashback to a time I had stopped in a service


station in Australia. I distinctly remember buying a green ice lolly, and what


the view was like out of the window. This event had little impact on my life


and I remember being completely relaxed at the time. I had been travelling for


a while and these stops were frequent enough to not be a ?first time


experience? and at the time could be considered mundane. On reading the


literature I struggled to find concrete information to ascertain if this


experience was a FM or just a very vivid autbiographical memory. The experience


had not been rehearsed, yet was brought back spontaneously with incredible


clarity more than two years on. Supporters of FMs would argue that this memory


In terms of long term potentiation this memory may LTP put in buffer zone activated by levels of


arousal or attention that were high for the entire trip. Once back in England,


the whole of that experience may have been related to personal importance and


Current life plans (Conway, 1995) and therefore what was not seen as important


at the time may have become so a few months later. Similarly my memories of


university so far seem quite vague, however it may that once my life plans


change in the future, some of these memories may be afforded flashbulb quality.


Perhaps many of these memories are of flashbulb quality, but are not remembered


at the moment as such as they have little consequence in an environment that is


constant. In my opinion there is a sliding continuum in


terms of flashbulb memories and other autobiographical memories. As mentioned,


autobiographical memories are thought to be arranged in a hierarchic structure


that involves levels of general and minuate. In my opinion, FMs represent the


formation of extreme memories that require little thought to remember. In this


way FMs may be qualitively different to ordinary memories, in that they are


simply higher on the scale of specificity. My argument therefore is that yes


flashbulb memories are different from ordinary mundane autobiographical memory.


As vivid memories are also distinct from mundane memories, FMs in my opinion


are not unique in their formation, longevity and clarity. Conway argued that the distinction of FMs and


autiobiographical memory is the reconstructive quality of ordinary memories.


However studies of patients within intensive care units (Jones, Griffiths &


Humphris, 2000) have shown that in the understandable unpleasant emotions


coupled with drugs enhances memory for internal events such as hypnogogic


hallucinations. Attention shifts during these hypnogogic images from the


external to the internal. Patients show poor recall for their external


environment, but vivid memories for the hallucinations and nightmares. Although


the authors use Conway?s suggested four variable interaction to explain the


events in terms of emotion and personal consequentiallity, the fact that these


vivid memories were constructed and not infact viewed independently may weaken


the difference between FMs and other autobiographical memories. It seems that FMs have been applied to so


many extreme memory phenomenon that they are a class of their own. Mauricio


& German (1999) have claimed that


to see flashbulb memories as being unique


and without parallel in psychology is wrong. They argue that psychologists should


consider flashbulb memories as being members of a ?broad family of experiences


that include drug flashbacks, palinopsia, palinacusis, posttraumatic memories,


and the vivid and haunting memories experienced by subjects with some forms of


mental disorder?. As the longevity and accuracy of memories involved with


posttraumatic stress disorder has been questioned (Baddeley, 1997)In conclusion there is considerable evidence


that humans do have memories that are extremely vivid, clear and long lasting.


However these FMs themselves

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