Working
memory plays an important role in supporting children’s learning over the
school years, and beyond this into adulthood. Working memory is crucially
required to store information while other material is being mentally
manipulated during the classroom learning activities that form the foundations
for the acquisition of complex skills and knowledge. A child with a poor
working memory capacity will struggle and often fail in such activities,
disrupting and delaying learning.
Working
memory is the term used to refer to a system responsible for temporarily
storing and manipulating information. It functions as a mental workspace that can
be flexibly used to support everyday cognitive activities that require both
processing and storage such as, mental arithmetic. However, the capacity of
working memory is limited, and the imposition of either excess storage or processing
demands in the course of an on-going cognitive activity will lead to great loss
of information from this temporary memory system.
A
good example of an everyday activity that uses working memory is mental
arithmetic. Imagine, for example, attempting to multiply two numbers (e.g., 43,
27) spoken to you by another person, without being able to use a pen and paper
or a calculator. First of all, you would need to hold the two numbers in
working memory. The next step would be to use learned multiplication rules to
calculate the products of successive pairs of numbers, adding to working memory
the new products as you proceed. Finally, you would need to add the products held
in working memory, resulting in the correct solution.
To
do this successfully, it is necessary to store the two numbers, and then
systematically apply multiplication rules, storing the intermediate products
that are generated as we proceed through the stages of the calculation. Without
working memory, we would not be able to carry out this kind of complex mental
activity in which we have to both keep in mind some information while
processing other materials. Carrying out such mental activities is a process
that is effortful and error prone. A minor distraction such as an unrelated
thought springing to mind or an interruption by someone else is likely to
result in complete loss of the stored information, and so in a failed
calculation attempt. As no amount of effort will allow us to remember again the
lost information, the only course of action is to start the calculation afresh.
Our
abilities to carry out such calculations are limited by the amount of
information we have to store and process. Multiplying larger numbers (e.g., 142
and 891) “in our heads” is for most of us out of the question, even though it
does not require greater mathematical knowledge than the earlier example. The
reason we cannot do this is that the storage demands of the activity exceed the
capacity of working memory.
Hence
a deliberate attempt should be made for development of working memory among school
going children.