Chp 5 - Working/Short Term Memory Flashcards
Atkinson and Shiffrin’s (1968) Modal Model (5)
Modal model of memory: The standard model of memory consists of 3 primary components
The sensory registers
Short-term store
Long-term store
- Control processes
- Encoding
Sperling 1960 (STM recall task)
Full report condition:
* Participants recalled on average 3-5 individual letters
Partial report condition:
* When cued to remember a specific row, participants recalled 3-4 items correctly
concluded that a short-lived sensory memory registers all or most of the information that hits our visual receptors, but that this information decays within less than a second.
Controlled processes (proposed by Atkinson & Shiffrin)
the part of the standard model of memory responsible for the active manipulation of information in STM
Dynamic processes associated with the structural features that can be controlled by the person and may differ from one task to another.
An example of a control process that operates on short-term memory is ‘rehearsal’. Other examples are strategies used to help make a stimulus more memorable and strategies of attention that help you focus on information that is particularly important or interesting.
Baddeley’s Model of Working Memory (4)
This model assumes that each component has a limited capacity and is relatively, not entirely, independent of the others.
1) the phonological loop
2) the visuo-spatial sketchpad
3) the central executive.
4) episodic buffer.
Phonological similarity effect
Information can be represented:
* Wickelgren (1965)
* Participants tend to confuse similar-sounding letters (e.g. B and
C) but not similar-looking letters (e.g. O and Q)
Brandimonte et al. (1992) (pipe cup thing)
demonstrated that materials can be processed in visual form if the verbal channel via the phonological loop is made inaccessible.
visual processing in working memory
Interfere rehearsal
- Those who had to repeat “lalala” were not afriad to attached a label to the objects,
- Less to think of a pipe as a pipe
- Easier to think of the removed part from pipe, as a cup
Identified the shape easier due to no verbal label
Not repeated:
- Rehearsed the pipe as a pipe, labelled
support Baddeley’s theory
Brooks (1968) (mechanisms)
When task and respond rely on same mechanism, response is worse
- Spatia-spatial maxes out capacity of the visuospatial sketchpad (vs. spatial verbal)
- Verbal-verbal maxes phonological loop
- Tax out same resources
- Incorporation of 2 things
The sensory registers
(Modal Model) (3)
- E.g., iconic and echoic memory
- High capacity but limited duration
- an initial stage that holds all incoming information for seconds or fractions of a second
Short-term store
(Modal Memory) (5)
- Information can be represented:
- Visually
- Phonologically
- Semantically
- Duration: very short (~20 seconds)
- Capacity: 7 +/- 2?
Long Term Store
(Modal Memory)
- can hold a large amount of information for years or even decades
1) the phonological loop
(Baddeley) (3)
- processes sounds and is responsible for speech based information.
- this includes sounds that are processed in one’s mind.
- For example, the phonological loop is used in learning new vocabulary, problem-solving, math problems, and remembering instruction
2) the visuo-spatial sketchpad
(Baddeley) (3)
- responsible for processing visual and spatial information.
- It can be fed either directly, through perception, or indirectly, through a visual image.
- The visuo-spatial sketchpad allows people to store images of objects and their locations.
3) the central executive.
(Baddeley)
- incorporates information from the phonological loop, the visuo-spatial sketchpad, the episodic buffer, and from long-term memory
- the switching of retrieval plans, time sharing in multitasking, selective attention, suppressing irrelevant information, daydreaming, and temporary activation of long-term memory.
4) episodic buffer.
(Baddeley)
temporary store that integrates information from the other components and maintains a sense of time, so that events occur in a continuing sequence.
- seen as a place to temporarily integrate information gathered from the phonological loop, visuo-spatial sketchpad, and long-term memory.
- controlled by the central executive, yet it transfers information into and out of the long term store.
Encoding
(Modal Model)
the act of taking in information and converting it to a usable mental form
o i.e., encode auditory info into sensory memory, if the info is transferred to STM then it is said to have been encoded to STM
Brown and Peterson: causes of forgetting
forgetting might be caused by the passage of time before testing (decay)
Brown-Peterson Task
- short-term memory task showing forgetting caused by proactive interference
- People were given a 3-letter trigram and a 3-digit number and asked to count backward by 3s
- This distractor task requires lots of attention and prevented the rehearsal of information (backward counting)
Results
- With an increasing time span less and less information remains in short-term memory
- Waugh and Norman thought the distractor task might be a source of interference
- This study suggested that forgetting was influenced by number of intervening items, not just the passage of time
Proactive Interference (PI)
Keppel and Underwood (1962)
Older material interferes forward in time with recollection of current stimulus
e.g., stimuli learnt from an earlier list cause difficult in recalling later words