Short-term memory & working memory

18 important questions on Short-term memory & working memory

What is the Atkinson-Shiffrin model?

Sensory input --> Sensory store (All information is lost 0,5-3 seconds)

Sensory store with attention --> ST or WM (unrehearsed info lost in 10-15 seconds)
- Maintenance rehearsle to keep information in store

WM can encode to and retrieve from LTM

What did Sperling show about Iconic memory?

Partial reproduction: Cue shows which line to remember --> People can remember more objects in theory

Why can't you use an arrow when testing iconic partial reproduction?

You're testing iconic information.
Arrow is iconic information so it might override.
Use a sound instead
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How do you test echoic memory?

3 speakers with different lines. Use light to indicate which one to produce

What are characteristics of the short-term store (STS)?

- Depends on attention
- Limited capacity (Miller: 7 +-2 chunks)
- Serial processing (rehearsal) required

What does a Brown-Peterson task show about STS?

- Task: 3 words/letters presented --> do a task for a certain amount of seconds --> Retrieve first 3 words/letters

The longer the 2nd task --> Worse retrieval

How can you test the difference between decay and interference in STS?

Decay: Time between cue & answer
Interference: other information that has to be processed.

Task:16 digit list --> Only 1 number was repeated.
- Time between each number being said: Decay (1 per second or 4 per second)
- Numbers in between first mention & repeat: interference      

Conclusions on this task:- Decay had no influence, interference had.
(but they only used 4 subjects)

What is the Suffix effect?

Serial recall in 9 item list.
Additional item (suffix): Word zero or sound by buzzer.

Results: Buzzer  --> Much higher recency effect than word zero

What stands out in a reproduction task in Amnesia patients?

- Produce fewer items
- Normal recency effect

What are findings of the effect of word characteristics in a recall task?

If a list contains words that are almost the same (Man, cap, mad) percentage of recall is lower.

but: If they are semantically the same (big, great, huge) --> No lower recall percentage

What is the influence of syllables in numbers?

More syllables a number has (in native lang) --> Smaller digit span

Four vs Quatro

What tests are evidence for the visuo-spatial sketchpad?

- Mental rotation task: Longer if the rotation takes longer (is it the same object)
- Island task: Takes longer if the point on the island is further away?

What is a visual memory span?

Show squares where some are filled out --> Blink --> Show the same square with a change.
Which block has changed?

Are Humans the smartest when it comes to visualspatial sketchpads?

No --> Chimps much better.

Theory: Visual information needed if you have to climb and jump quickly in the jungle.

How can you improve working memory?

Chunking (uses long term memory)

What is the irrelevant speech effect?

Phonological loop is less efficient when there is irrelevant speech in the background, even if it is in a language you don't understand.
You can study better with no music

What is the phonological similarity effect?

Phonological similar items are more likely to lead to errors.

Performance not as bad when the words in the list rhyme,
worse when they are alliterative(share same beginning sound),
worst when both of these are occuring throughout the list.

What is the lexicality effect?

Better at remembering words than non words. WM is influenced by prior knowledge

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