- [Instructor] Aging is
a natural process and with it come changes in memory. Most people associate aging with declines in cognitive performance. My mom will say she's
having a senior moment when she forgets something,
for example, but never fear, not all cognitive changes
in adulthood are negative. Some abilities remain relatively stable, and some even improve, so
let's start with the positive. Abilities that remain stable. First of all, implicit memory stays about the same across the lifespan. In other words, once you've
learned to ride a bike that procedural memory is
likely to stay with you as you age barring any
brain damage or disease. Recognition memory also stays
relatively stable over time. Meaning that once you learn
something, your ability to pick it out of a list
later remains about the same whether you're 27 or 67. Now for abilities that improve. Semantic memory improves
until around age 60, and only then starts declining. This means that older adults
still have good verbal skills, and why they make excellent
crossword puzzle buddies. A related area in which older
adults tend to score better than younger adults is
crystallized intelligence. Which involves the ability to
use knowledge and experience. Since older adults have had more time to gain knowledge and experience,
this pattern makes sense. Crystallized intelligence is often tested with reading comprehension
and analogy tests, so older adults tend to be better at those than younger adults. Finally, older adults tend
to be better at reasoning in the face of interpersonal or emotionally charged problems. Again the theory is that
with their greater experience and knowledge of these
types of situations, they are more likely to have been through some similar situation and be able to draw from that experience. Of course, there are
some cognitive abilities that decline as we age. Recall becomes more difficult. Although recognition is stable,
it's harder for older adults than younger adults to
generate responses without cues like there are in a free recall or it's sometimes cued recall test. Similarly, episodic memory is impaired. Often memories formed a long time ago will be relatively stable, but
forming new episodic memories becomes more difficult as we age. Processing speed slows down as we age, so if you're watching
Jeopardy with grandma, she might know just as many
answers as you do, if not more, but she'll have a harder
time outputting the response within such a short period of time. Related to processing speed, divided attention becomes more difficult. As we age, it becomes increasingly harder to effectively switch our
attention between tasks, so we become more easily distracted. The bottom line is that cognitive changes in adulthood aren't all negative. Although some cognitive abilities
do decline, it's important to remember that in healthy, older adults some cognitive abilities will
remain stable or even improve.