According to Salthouse's processing theory of cognitive aging, slower processing causes a decline in memory functioning.
A cognitive mechanism with a limited capacity called working memory is in charge of temporarily storing information so it can be processed.
The working memory loses part of its capability as we become older. This makes it more challenging for us to focus on many tasks at once or remember specifics of an event. It gets worse for an elderly person.
According to Tim Salthouse, slower processing causes the contents of working memory to deteriorate, lowering effective capacity.
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