Overview of memory
Download
1 / 27

Overview of Memory - PowerPoint PPT Presentation


  • 78 Views
  • Uploaded on

Overview of Memory. Atkinson-Shiffrin Model. RETRIEVAL. ATTENTION. Sensory Memory. Short-Term Memory. Long-Term Memory. Sensory Signals. REHEARSAL. “Types” of Memory. Sensory Memory brief ( < 1 second) preattentive / parallel processing (very large capacity). Sensory Memory. Capacity.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Overview of Memory' - peyton


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Overview of memory
Overview of Memory

  • Atkinson-Shiffrin Model

RETRIEVAL

ATTENTION

Sensory Memory

Short-Term Memory

Long-Term Memory

Sensory Signals

REHEARSAL


Types of memory
“Types” of Memory

  • Sensory Memory

    • brief ( < 1 second)

    • preattentive / parallel processing (very large capacity)



Capacity
Capacity

  • Describe a simple experiment that could measure the capacity of “memory”


Capacity1
Capacity

  • Describe a simple experiment that could measure the capacity of “memory”

  • Briefly present some letters or digits and then ask the subject to report them

    • Called “whole report”


Capacity2
Capacity

F S F E

G S A U

T O C G


Capacity3
Capacity

“Recall as many letters as you can”


Capacity4
Capacity

  • George Sperling - Systematic investigation of memory capacity

    • Result: subjects accurately recall 3 or 4 items

    • What can you conclude from this result?


Capacity5
Capacity

  • What if subjects forget as they are recalling?


Capacity6
Capacity

  • What if subjects forget as they are recalling?

  • How could you modify the experiment to measure the instantaneous capacity, before any forgetting can occur?


Capacity7
Capacity

  • Partial Report - briefly present letters or digits and ask subject to report only some of them

“Report the letters in the row indicated by the arrow”


Capacity8
Capacity

U E S B

O D W A

I B V S



Capacity10
Capacity

Which Letters?


Capacity11
Capacity

  • Partial Report

  • Result: subjects can recall any 3 or 4 letters that are indicated by the arrow !


Capacity12
Capacity

  • Partial Report

  • Result: subjects can recall any 3 or 4 letters that are indicated by the arrow !

  • What does this mean about the capacity of memory?


Capacity13
Capacity

  • There is some part of the perception system that stores huge amounts of information…


Duration
Duration

  • But for how long? How would you design an experiment to measure the duration of this high-capacity memory system?


Duration1
Duration

  • But for how long? How would you design an experiment to measure the duration of this high-capacity memory system?

  • Vary the onset of the probe


Duration2
Duration

  • Partial Report

10

# of letters

potentially recalled

4

0

0 ms

500 ms

never

Probe Delay


Duration3
Duration

  • Partial Report

10

# of letters potentially

recalled

4

0

0 ms

500 ms

never

Delay

Interpretation:

Information dwells in a brief storage “buffer”

duration of storage lasts about 1/2 of one second


Iconic memory
Iconic Memory

  • a brief storage of “raw data” in the visual system


Echoic memory
Echoic Memory

  • Auditory information is stored in a similar sensory “buffer”

    • Echoic memory seems to last for several seconds


Properties of sensory memory
Properties of Sensory Memory

  • Brief (iconic ~500ms; echoic ~2 seconds)


Properties of sensory memory1
Properties of Sensory Memory

  • Brief (iconic ~500ms; echoic ~2 seconds)

  • unlimited capacity


Properties of sensory memory2
Properties of Sensory Memory

  • Brief (iconic ~500ms; echoic ~2 seconds)

  • unlimited capacity

  • pre-attentive


Next time
Next Time:

  • Short-term memory


ad