Read the following passage from a scientific article on the
effects of sleep deprivation on cognitive function.
"Prolonged sleep deprivation has been shown to impair
various cognitive functions, including attention, memory,
and decision-making. Studies indicate that individuals
who sleep less than six hours per night for extended
periods experience significant reductions in their ability to
concentrate, retain information, and make sound
judgments. Moreover, the negative effects of sleep
deprivation are cumulative, meaning that even small
nightly deficits can add up to substantial impairments
over time. These findings underscore the importance of
adequate sleep for maintaining optimal cognitive
performance."
Which statement best summarizes the author's findings?