Baddely and Hitch developped a multi-store
model of STM, proposing that STM s made up
of several different stores
The model was based on results from studies
using 'interference tasks'. If the ppts were asked
to perform two taks simultaneously that use the
same system their performance will be affected -
the system can't cope with both tasks. However if
they complete two taks using different systems,
performance isnt affacted on either task.
THE CENTRAL EXECUTIVE
In charge of attention. It has a limited
capacity and monitors incoming
information and allocates tasks to it's two
slave systems; the articulatory
phonological loop, and visuo-spatial
sketchpad.
ARTICULATORY
PHONOLOGICAL LOOP
Holds speech based information. It contains; a phonological store (the inner ear)
which stores the words you hear and an articulatory process (the inner voice) which
allows maintenance rehearsal
VISUO-SPATIAL
SKETCHPAD
Deals with temporary storage of
visual and spatial information
EVALUATION
STRENGTHS
Shallice and
Warrington
(1974) found
support for the
working
memory moddel
in the study of
KF, as they found
evidence for
seperate systems
within STM.
WEAKNESSES
Many psychologist have critised the model as the idea of the central
executive is too vague and simplistic. Their model doesnt explain the
central exectutive other than it's involved in attention