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MEMORY
Dr Ravi Soni
MEMORY
• Cognition: is the processing of the
information coming from the environment
through our senses.
• Information: refers simply to sensory
input from the environment
MEMORY
• Memory: is complex cognitive or mental process
that involves encoding, storage and retrieval of
the information.
I. Encoding: is process of receiving input and
transforming it into a form or code, which can be
stored.
II.Storage: is process of actually putting coded
information into memory.
III.Retrieval: is process of gaining access to
stored, coded information when it is needed.
MEMORY
• Theories of memory formation:
1.Information-Processing theory
1.Level of processing theory
Information-Processing Theory
• Like digital computer
• Developed by Richard Atkinson and Richard Shiffrin (1968)
• Environment sensory input Sensory register
Short term memory (STM)
Retrieval
Categorization Long term memory Rehearsal
(LTM)
• Example: Remembering telephone number
Sensory Register
• Storage function sensory channels (visual, auditory,
olfactory, tactile, gustatory) is called sensory register.
• Information is held for very brief period
• Most of it is usually lost
• Information which was attended and recognized, passed
to STM
• Visual sensory register holds information for 1 second in
the form of ICONIC IMAGE which is a copy of visual
input stored as faint image
• Auditory sensory register holds information for 4 to 5
seconds.
Short Term Memory
• The memory which holds information received from the sensory
register for upto 30 seconds, length of time depends on number of
factors.
• Experiment: technique used in this experiment is called ‘FREE
RECALL’. The subjects were shown 15 nouns. Each presented for 1
sec. and 2 seconds interval in between, subjects were asked to
recall the nouns in any order that came to mind
• Zero delay condition:
1. Serial position effect
2. Primacy effect
3. Recency effect
• 10 or 30 seconds delay: If delay interval is filled with mental activity,
decrease or elimination of recency effect but not primacy effect was
found
Short Term Memory
• Cause: last item in the list is still in STM
• STM: Transient quality
Limited storage capacity-7 items, plus or minus 2
• Storage capacity can be increased by process called
CHUNKING- dividing total information into chunks and
then remembering them
• Example: remembering telephone numbers
• Fate of information in STM: information is mostly lost
by newer information which displaces the old one.
• Some of the information in the STM is neither lost nor
retrieved but passed along the next memory stage (long
term memory) through REHEARSAL.
Rehearsal
• Process of rehearsal consists of keeping items
of information in the centre of attention, perhaps
by repeating items silently or aloud.
• More the item is rehearsed more likely it
is to be transformed into long term memory.
• Depends upon: Amount of rehearsal
Ways of rehearsal
Rehearsal
Maintenance
rehearsal
o Passive process of
repetition
o Going over and over
again, what is to be
remembered
Elaborative
rehearsal
o During rehearsal
material is given
organization and
meaning so that it can
be fitted into existing
organized long term
memories
Long Term Memory
• The memory which holds information received from STM
for long period of time. (precise time not known)
• May be days, months, years or life time
• Storage capacity-no limit
• FORGETTING OF LTM: information is there, we have
difficulty in retrieving it because
• It is not stored in an organized fashion or we are not
searching it in right path of memory storehouse
• Of confusion & interference produced by new things
which have been learned and put into LTM
Long Term Memory
• LTM: contains words, sentences, ideas,
concepts and the life experiences, we have had
• SEMANTIC MEMORY: contains meanings of
words & concepts and the rule of using them into
the language, it is a vast network of meaningfully
organized items of information
• EPISODIC MEMORY: containing memories of
things that have happened to a person in the
past.
Level of Processing Theory
• According to this theory, incoming information can be
worked on at different levels of analysis, the deeper the
analysis goes, the better the memory.
• Perception: gives us immediate awareness of the
environment
• Structure: features of input (what it looks like, or sounds
like) are analyzed
• Meaning: meaning of the input is analyzed
• Analysis to the deep level of meaning gives the best
memory
• Routine happenings of daily life are not processed
deeply
Level of Processing Theory
• Rehearsal plays a role in the deeper processing
of the information.
• Maintenance rehearsal is not enough for good
memory
• Elaborative rehearsal processes information to
the meaning level, so that memory is well
retained
• Greater elaboration greater possibility
that memory is remembered

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Memory theories

  • 2. MEMORY • Cognition: is the processing of the information coming from the environment through our senses. • Information: refers simply to sensory input from the environment
  • 3. MEMORY • Memory: is complex cognitive or mental process that involves encoding, storage and retrieval of the information. I. Encoding: is process of receiving input and transforming it into a form or code, which can be stored. II.Storage: is process of actually putting coded information into memory. III.Retrieval: is process of gaining access to stored, coded information when it is needed.
  • 4. MEMORY • Theories of memory formation: 1.Information-Processing theory 1.Level of processing theory
  • 5. Information-Processing Theory • Like digital computer • Developed by Richard Atkinson and Richard Shiffrin (1968) • Environment sensory input Sensory register Short term memory (STM) Retrieval Categorization Long term memory Rehearsal (LTM) • Example: Remembering telephone number
  • 6. Sensory Register • Storage function sensory channels (visual, auditory, olfactory, tactile, gustatory) is called sensory register. • Information is held for very brief period • Most of it is usually lost • Information which was attended and recognized, passed to STM • Visual sensory register holds information for 1 second in the form of ICONIC IMAGE which is a copy of visual input stored as faint image • Auditory sensory register holds information for 4 to 5 seconds.
  • 7. Short Term Memory • The memory which holds information received from the sensory register for upto 30 seconds, length of time depends on number of factors. • Experiment: technique used in this experiment is called ‘FREE RECALL’. The subjects were shown 15 nouns. Each presented for 1 sec. and 2 seconds interval in between, subjects were asked to recall the nouns in any order that came to mind • Zero delay condition: 1. Serial position effect 2. Primacy effect 3. Recency effect • 10 or 30 seconds delay: If delay interval is filled with mental activity, decrease or elimination of recency effect but not primacy effect was found
  • 8. Short Term Memory • Cause: last item in the list is still in STM • STM: Transient quality Limited storage capacity-7 items, plus or minus 2 • Storage capacity can be increased by process called CHUNKING- dividing total information into chunks and then remembering them • Example: remembering telephone numbers • Fate of information in STM: information is mostly lost by newer information which displaces the old one. • Some of the information in the STM is neither lost nor retrieved but passed along the next memory stage (long term memory) through REHEARSAL.
  • 9. Rehearsal • Process of rehearsal consists of keeping items of information in the centre of attention, perhaps by repeating items silently or aloud. • More the item is rehearsed more likely it is to be transformed into long term memory. • Depends upon: Amount of rehearsal Ways of rehearsal
  • 10. Rehearsal Maintenance rehearsal o Passive process of repetition o Going over and over again, what is to be remembered Elaborative rehearsal o During rehearsal material is given organization and meaning so that it can be fitted into existing organized long term memories
  • 11. Long Term Memory • The memory which holds information received from STM for long period of time. (precise time not known) • May be days, months, years or life time • Storage capacity-no limit • FORGETTING OF LTM: information is there, we have difficulty in retrieving it because • It is not stored in an organized fashion or we are not searching it in right path of memory storehouse • Of confusion & interference produced by new things which have been learned and put into LTM
  • 12. Long Term Memory • LTM: contains words, sentences, ideas, concepts and the life experiences, we have had • SEMANTIC MEMORY: contains meanings of words & concepts and the rule of using them into the language, it is a vast network of meaningfully organized items of information • EPISODIC MEMORY: containing memories of things that have happened to a person in the past.
  • 13. Level of Processing Theory • According to this theory, incoming information can be worked on at different levels of analysis, the deeper the analysis goes, the better the memory. • Perception: gives us immediate awareness of the environment • Structure: features of input (what it looks like, or sounds like) are analyzed • Meaning: meaning of the input is analyzed • Analysis to the deep level of meaning gives the best memory • Routine happenings of daily life are not processed deeply
  • 14. Level of Processing Theory • Rehearsal plays a role in the deeper processing of the information. • Maintenance rehearsal is not enough for good memory • Elaborative rehearsal processes information to the meaning level, so that memory is well retained • Greater elaboration greater possibility that memory is remembered