In a 2004 article
for the International Journal of Geriatric Psychiatry, Anthea Tinker writes: 'There are clear
markers of ageing in biology '¦ and in psychology.'15 Some of these can affect how easily the
person can read and understand text. Key changes reported widely16 include a decline in
eyesight, in speed of processing information and in working memory (the brain system that
temporarily stores and manipulates the information needed for complex mental tasks).