Types of Memory

Types of Memory

1. Sensory Register

   • environment -> stimulus -> senses
   • v short duration/capacity
   • coded by sense

2. STM

   • short
     • duration
       • PETERSON AND PETERSON
         • trigrams
         • 3,6,9,12,15,18 seconds
           • counting backwards
         • 3 secs - 80% 18 secs - 10%
         • lab exp
           • confusion
           • one type of stimulus only
     • capacity
       • MAGIC MILLER
   • coded acoustically

3. LTM

   • unlimited capacity/duration
     • BAHRICK et al
       • 392 - classmate recall
         • free recall
         • photo recognition
         • name recognition
       • 15 years
         • 90% names/faces 60% FR
       • 30 years
         • 30% FR
       • 48 years
         • 80% names 40% faces
       • field experiment
       • rec better than recall - there but not accessible
   • coded semantically
   • TYPES
     • episodic
     • semantic
     • procedural

4. BADDELEY - coding

   • acoustically similar words
   • semantically similar words
   • recall immediately / after 20 minutes
     • lacks EV
     • doesn't consider TYPES of LTM
     • 20 mins = LTM?