Saturday, April 11, 2020

Forgetting: An introduction


Meaning     
Literary meaning – Fails to remember   
Meaning in psychological parlance – Inability to recall stored information into the present state of mind.
Definition
      According to Bhatia (2009), “Forgetting is the failure of the individual to revive in consciousness an idea or group of ideas without the help of the original stimuli”.
         According to Drever (1952),  “Forgetting means failure at any time to recall experience, when attempting to do so, or to perform an action previously learnt”.
Introduction
          Hermann Ebbinghaus (1913) pioneered the study of ‘forgetting’. He created nonsense syllables (consonant-vowel-consonant) (meaningless words) to test his memory. Out of his experiments on himself he drew a curve which is famously called as ‘Forgetting Curve’.
         The forgetting graph indicates that forgetting occurs fast within first hour (almost 56%). The curve indicates that forgetting is fastest within 1 hour of learning. This means that when the retained material is not rehearsed or activated frequently it is likely to be forgotten.
       
 Interestingly forgetting occurs in LTM due to decay of memory traces (engrams) that are formed in the neural circuits. Peterson & Peterson (1959) demonstrated that 10% retained material washes out within first 18 seconds. It means traces are highly vulnerable to decay. Forgetting also occurs in STM but here it occurs due to its limited storage capacity.

          Forgetting is the phenomenon where tracking and identification of engrams becomes almost impossible consequently failing to bring them back in consciousness. 
Forgetting has two inherent components i.e.
(i)       Lack of availability – It means stored information is no more available.
(ii)      Lack of accessibility – It means the stored information is available but not accessible for recalling.

Characteristics of Forgetting
(i)       Forgetting occurs in both STM and LTM. In STM due to limited capacity, duration, displacement and trace decay while in LTM due to interference, trace decay and various other factors.
(ii)      Forgetting is caused due to fading of information. Fading is faster in STM than LTM.
(iii)     Lack of adequate attention or focus facilitates forgetting.
(iv)     Retrieval failure is the one of major causes of forgetting.     
(v)      Forgetting can be motivated.
(vi)     Forgetting can have psychological, biological and social contexts.
(vii)    Forgetting is the function of lack of accessibility and/or availability of information.
Causes of Forgetting
(i)       Psychological Amnesia (Encoding and Storage failure)
(ii)      Biological amnesia
(iii)     Social Amnesia (Beiner, 2018)
(iv)     Trace decay
(v)      Interference
(vi)     Delay in rehearsal
(vii)    Lack of rehearsal (maintenance & elaborate)
(viii)   Retrieval failure
(ix)     Entropy through disuse
(x)      Dearth of Storage Space
(xi)     Motivation to forget
(xii)    Lack of consolidation
(xiii)   Lack of physical activity and poor diet
(xiv)   Ageing
(xv)    Nature of material learned

Important Theories of Forgetting
(i)       Interference Theory – This theory suggest that information causes interference in retrieval and recall of other information. The interference of two types i.e. Proactive and Retroactive interference.
      (a)      Proactive Interference – When previously learned information causes disturbance in retrieval of newer information.
     (b)      Retroactive Interference – When newer information interferes with retrieval of previously learned information.
(ii)      Trace Decay Theory [use it or lose it] – This theory suggests that LTM is formed due to occurrence of physical changes in the brain [memory trace] (Brown, 1958). The loss of these traces [engrams] due to several factors such as disuse, passage of time etc. leads to forgetting.

References:
1.            NCERT, XI Psychology Text book.
2.       Beiner, Guy (2018). Forgetful Remembrance: Social Forgetting and Vernacular    Historiography of a Rebellion in Ulster. Oxford University Press. ISBN 9780198749356.
3.       Brown, J. (1958). Some tests of the decay theory of immediate memory.           Quarterly Journal of Experimental psychology, 10, 12-21.

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