A series of cognitive tests (memory, attention, language, executive
function) were administered to 67 young and old participants aged
from 20s to 70s. Each task was programmed using a computer
software and performed on the computer. For the memory and
language tests, participants responded verbally to the instructions and
for the attention and executive function tasks, they responded by
pressing big-sized buttons designed for people with disabilities. The
study demonstrated overall age-related cognitive deficits in older adults
but showed that some cognitive functions, such as attention and
language, seemed more resilient to aging than others. The results also
showed that memory impairments in older adults seemed due to a
lack of encoding rather than retrieval; education level turned out to
be an important factor in language but not to other cognitive
functions and generally attention declined as people got older and
their attention deficits were even more prominent while doing more
complex attention tasks. Statistically controlling for attention, however,
did not directly affect the test results of other cognitive functions.