multi store model

How many marks is this question? Because your answer depends on how many marks its for. Since you haven't mentioned the number of marks, I'll give an answer for 4 marks.

1) The multi-store model of memory (I'll refer to it as MSM) is too simplistic as it suggests that both short term memory (STM) and long term memory (LTM) are single 'unitary' stores. There's research support that both STM and LTM are divided into a number of qualitatively different stores (Working Memory Model = WMM) i.e. there's a difference in type of memory stored in each store. For example, for STM, the phonological loop holds auditory information but the visuo-spatial sketchpad holds visual and/or spatial information. Elaborative rehearsal in the MSM explains long-term semantic memories but doesn't explain long-term episodic memories.

2) Doesn't explain dual task performance unlike the WMM

3) Case studies used as research support for STM and LTM which might decrease external validity

4) The MSM suggests that STM is involved before LTM, however one researcher argued that STM actually relies on LTM and thus cannot come first as shown by MSM