Working Memory Flashcards
Week 2
what are the different informational proicessing techniques used in cognitive psychology?
○ Bottom-up: directly affected by the stimulus input (data-driven)
○ Top-down: influenced by an individual’s expectations/knowledge (what you already know)
○ Serial processing: Only one cognitive process occurs at any one time (one has to be completed for another to start)
Parallel processing: More than one process occurs at the same time (doing several things at the same time)
what is cognitive psychology?
○ Use behavioural evidence to understand cognition.
* Things people do.
what is metatheory?
a set of assumptions and guiding principles
why is metatheory importnat in cognitive research?
- Scientists need more than just questions when deciding:
○ What experiments need to be done?
○ How should these experiments be undertaken?
○ When we are trying to find things out, we need more than just questions - Use operationalisation in order to measure them.
- ○ Not guaranteed to be an accurate measure of peoples thoughts- need to find out what is the best way to measure it in order to get the most reliable outcomes.
○ People not aware of every thought occurring.
○ Where to start?
○ What to look for?
○ What to be aware of?
what is meant by the term human computer?
- Human beings are data processing systems.
A way of understanding human’s cognitive processes
what are the 3 stages of memory?
- encoding
- storage
- retrieval
what is encoding?
- Process of placing new information in memory
○ Change into a form that can be stored
§ Abstract out information- we don’t recall every detail.
§ Pick out key points that are the most memorable and important for what we are trying to achieve. - Sensory input= anything that happens during the experiene (senses)
- Encoding & storage= the information is stored in a way that is understandable.
sensory input -> encoding -> storage
what is storage?
- Concerns the nature of memory stores
○ Where is information stored?
§ Is it all in our brain?
○ How long will it last (duration)?
§ Long term memory has no known capacity or duration- may be there for the rest of your life (never forget them).
§ Autobiographical memory
○ How much can be stored (capacity)?
§ are not aware when our memory is “full”.
○ What kind of information is stored?
§ Why is some information more memorable than others? - Known as a memory trace
○ information stored in some way for later use
Available in memory
what is retrieval?
- Recovering stored information from memory
○ Bring info from memory to consciousness. - Can take one of two forms
- Recall
○ Retrieve information from memory in response to a cue or question - Recognition
○ Refers to ability to identify if encountered something before (i.e. familiarity)
○ Something previously seen.
- Recall
what is the multi-store model?
- Distinguish between short-term memory and long-term memory
Both have different attributes
what are the different attributes between STM and LTM?
STM:
* Limited capacity (only information that is being attended to at that time)
* Hold items for short duration
* Physical/sensory codes (focus on immediate experience)
* Trace decay/interference
* Primarily associated with the
* Prefrontal cortex
LTM
* Unlimited capacity (haven’t yet reached a point where people cannot remember anything else).
* Indefinite duration/permanent
* Meaning/semantic codes (rather than immediate experience, abstraction of knowledge, not verbatim recall)
* Cue dependent forgetting (basis of how memory can be retrieved)
* Primarily associated with the
* Hippocampus
what is atkinson & shiffrin’s (1968) multi-store model?
- Sensory store is information taken in from what is happening around you in the environment.
○ A lot of it tends to be ignored
○ A momentary impression
○ Relates to sensory experience of the world. - Anything that is paid attention to, goes to the short term memory
○ Information will be displaced if something better is found
If information is continued to be thought about (rehearsal), it goes to the long term memory.
what are sensory stores?
- Modality specific
○ Iconic memory = visual store
§ Things you see
○ Echoic memory = auditory store
§ Things you hear - Holds information very briefly (1-2s)
○ Information lost via decay (i.e., memory traces fade over time)
○ Due to us not being able to remember everything we experience. - Attention occurs after information held in sensory stores
Some information that is attended is processed by short-term store
what is sensory input and attention?
- While you may think you are taking in everything around you, you should be aware that this isn’t necessarily the case.
- May be due to short term capacity changes.
Have to actively pay attention to changes to see them occur.
what is short-term store?
- Very limited capacity
○ Amount remembered depends on the complexity.
○ 7 ± 2 items (Miller, 1956) - Items versus chunks
○ Help to increase knowledge.
○ Can integrate information into a single whole.
○ Integration of smaller units - Information lost via:
○ Displacement = when store is full, new information pushes-out old information to take its place.
replaces something else.
what is displacement and interference?
- Serial recall task
○ Recall items in exact sequence
○ Memory advantage for first and last few items
More reliably observed.