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according to which, the link between sensory rocesses and covnitive functioning becomes stronger in older adulthood than it was earlier in life
having a good sensory capabilities is related to good memory and verbal abilities ...associated w/ability to perform self-care |
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| the minimum amount of stimulation a sensory organ must recieve before the presence of a paricular stimulous is registered |
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the capability of the biological system to respond to stimulation.
inverse of threshold- the greater the sensetivity to a particular type of stimulation, the lower the threshold will be |
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refers to the intensity of stimulation needed in order for a stimulous to be detected 50% of the time when it is present
The specific level of intensity the tone must reach before the individual registers its presence
can vary depending on the pitch of the tone |
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takes into account not only sensetivity but also decisional process response criteria that account for an individual's success or failure to register the presence of a stimulous
older adults tend to be more cautious than younger adults |
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| the interpretation of stimuli at the central level (in the brain) |
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the interval that elapses between the onset of a stimulus and the completion of a response
3 categories: simple, choice, complex |
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Three types of Reaction Time:
Simple
Choice
Complex |
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Definition
Simple reaction time task: only one stimulus and one possible response
Choice reaction time task: 2 diff. signals/stimuli, each requires a diff. response
Complex reaction time task: there are more than 2 stimuli and each one requires a different response or combo of responses |
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Reaction time's 2 components:
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Definition
| Premotor time and Motor time |
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Definition
the time between the onset of a stimulus and the initiation of a motor respose
Accounts for ~ 84% of the total reaction time |
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Definition
The time that elapses between the initiation to the completion of the motor response
Accounts for ~ 16% of total reaction time |
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Term
| Age-Complexity Hypothesis |
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Definition
| older adults will be at a greater disadvantage as task complexity increases |
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Term
| Stimulus Persistence Theory |
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Definition
states that a stimulus registered by a sensory organ takes longer to be processed and cleared through the nervous system of an older adult
older adults need more time between stimuli ...sequential stimuli may blend together and be percieved as one if there isn't sufficient time between stimuli |
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Term
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some loss in smell and taste sensitivity as age
smell can be a warning signal- smoke, gas leaks, spoiled food
also affect appetite/nutritional balance |
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| Touch, Propioception, & Pain |
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Definition
Propioception- awareness of the position and movement of the body and limbs in space
touch and propioception affected by aging...higher threshold for detecting limb movements
PAIN...
-people differ in their sensitivity and willingness to report pain
-chronic pain complicates things because it can keep one from noticing pain stemming from an acute condition OR someone with chronic pain may have less reserve for coping with additional pain
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