Memory - Sensory, STM And LTM Flashcards
Encoding
How much info is taken in and recorded
Capacity
How much information can be held
Duration
How long Info can be held
Sensory memory encoding
Takes in info from the sense organs and holds them in the same form
Sensory memory capacity
Very large
Sensory duration
Info is stored in an unprocessed form. It is then transferred to short term mem through attention
Echoic
Auditory mem from the ears
Iconic
Visual info from the eyes
Haptic
Data/ info acquired through touch
Crowder 1993 - sensory
- sensory register retains iconic for a few milliseconds
- echoic lasts roughly 2-3 secs
Spearing 1960 - sensory
- presented a grid of letters for less than a seconds
- used tones to cue ppts to recall a specific row
- recall on the specific row was high- showing we have a large capacity
Shorty term memory encoding
Acoustically
STM capacity
The “magic no” of + or - 2 from 7 (5-9 items)
STM duration
Roughly 18-30 secs
Very short because it is temporary
Only a few seconds, before it decays unless we rehearse it
Conrad 1964 - stm encoding
- visually presented with a stimulus with letters 1 at a time
- letters that were acoustically similar are harder to recall from STM than those acoustically dissimilar.