Memory Flashcards
What is meant by sensory memory?
This in the sensory information, Which is only stored for 5ooths of a second and has a limited capacity
How is sensory memory stored into the STM?
Through encoding which occurs when we pay attention if not trace decay occurs
Iconic - is the visual input
Echoic - auditory input
what is encoding?
The way information is entered into the represented in the memory store. by sound, meaning or image
What is capacity?
The amount of memory that can be held in a memory store at any one time
What is duration
The length of time that memories can be held
Describe SHORT TERM MEMORY
Is held for 18-30 seconds
The method of Bahricks high school photograph study (1975)
Bahrick tracked down gradutates over a 50 year period
392 graduates were tested
half where in the recall group to name people in there year book without a list of names
the other were in the recognition group asked to match the name to the persons photo with a list of names
What did Bahricks study conclude?
The long term memory can last a lifetime is there is a cue to prompt the memory
What did Miller develop to find upon the short term memory’s capacity?
The digit span technique and immediate serial recall found that people’s STM can only hold 7+/- 2 items
Participants listened to an 11 digit number string and immediately had to recall what they heard in the correct order
Digit span was the amount of numbers they could correctly remeber.
what did miller’s study conclude on our STMS capacity?
Our STMs can record chunks of information rather then individually
what did peterson and peterson’s study of the STM investigate?
How long the duration of the STM is when rehearsal is prevented
The method of Peterson and Peterson’s study
Participants would be flashed a consonant trigram (3 consonant letters) and would have to count back in 3s from a number to prevent rehearsal and then after 3,6,9,12,15,18 seconds later would have to recall it
After 18 seconds only 10% could recall there trigrams,. Thus STM duration isnt longer then 18 seconds
what are the 3 types of LTM?
Procedural - our knowledge of how to do things (associated with the cerebellum and frontal cortex)
Episodic memories- memories of specific life events and have been time stamped in our lives ( associated with the hippocampus and temporal lobe)
Semantic memory- our general knowledge of the world ( associated with the anterior temporal lobe)
How does Clive wearing suggest there are multiple stores to the LTM?
has badly damaged episodic memory as cannot remember anything specific to himself but can remember how to play piano so has intact procedural memory
what is the primacy and recency effect?
Proved the STM and LTM as separate stores
Beginning information presented would have been transferred to the LTM so can easily be recalled (primacy effect)
Information called out last would still remain in the STM so can be recalled ( recency effect) shown by the dip in the middle position where info has decayed