[1]
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2945821/ Among
hearing people, the phonological loop is partially relied upon
for working memory but not exclusively. There's a heuristic - a
"rule of thumb" that's used as a baseline, of 7 distinct items
in working memory, +/- two, but according to this study, people
born deaf do not have diminished working memory capacity,
although they DO have fewer "items" available to recall in a
serial fashion - at least *seem-to*. IN this article the
rule-of-thumb itself is questioned because the 7 +/-2 was rather
over-reaching... and in fact people who have hearing, their
levels of serial item recall is typically at the same levels as
ASL users with only minor adjustments to lab study. So, point
is: The "extra two" that are sometimes measured are _likely_
echoing in the phonological loop. Meaning: There's not much
significance to the phonological loop to working memory.
References
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