hallenged in the late-1960s, and a proposal was advanced to the effect that information may not need to enter STM before reaching LTM because the inputs to these two systems are arranged in parallel. As the result of newer work, STM has come to be viewed as a diverse collection of temporary capacities that are distributed across multiple, separate processing modules. In this view, auditory-verbal STM is a temporary storage system only for phonologically coded information. "If one supposes that STM and LTM are serially organized, then one would expect a deficit in auditory-verbal STM to result in a corresponding deficit in LTM, but only to the extent that tests of LTM also depend critically on phonological analysis of verbal material," an expectation that has been supported by research findings (Squire, Knowlton, & Musen, 1993, p. 456).
An important insight to emerge is that LTM is not a single entity but is composed of several different components, which are mediated by separate brain systems (Squire, Knowlton, & Muse
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