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Chapter 33: Genetic and Environmental Influences on Cognitive Change
I am grown old and my memory is not as active as it used to be. When I was younger, I could remember anything, whether it had happened or not; but my faculties are decaying now and soon I shall be so I cannot remember any but the things that never happened. It is sad to go to pieces like this but we all have to do it.
The phrase cognitive aging evokes the notion of inevitable decline, although it is evident that some individuals decline sooner or more rapidly compared with others. To what extent is cognitive decline genetically programmed, and to what extent are environmental forces important? ...