relationships (test 2) Flashcards
define processing speed
the amount of time it takes for an individual to analyze incoming information from the senses, formulate decisions, and prepare a response (on the basis of that analysis)
is processing speed a fundamental unit of study in cognition and aging?
yes
define reaction time
the basic measure of processing speed
how do researchers measure reaction time?
researchers will ask participants to complete an action when the screen flashes a particular stimulus
what are the different types of reaction time tasks?
1) simple reaction time tasks
–> participants are instructed to make a response (ex. push a button) as soon as they see the target
2) choice reaction time tasks
–> participants must make one response for one stimulus and another response for a different stimulus
reaction times as a young adult will be ______ than as an old adult
LOWER (meaning quicker)
- age-effects: decreased reaction time (get slower with age)
what are the age-related hypotheses for reaction time?
1) general slowing hypothesis
- suggests that the increase in reaction time reflects a general decline of information processing speed within the nervous system of the aging individual
-(lack of efficiency in the CNS than the PNS)
2) age-complexity hypothesis
- suggests that through the slowing of central processes in the nervous system, older adults perform progressively more poorly as the tasks become more complex and their processing resources are stretched more and more to their limit
-(seen in the Brinley Plot)
what is the Brinley Plot?
A plot in which reaction times of older adults are graphed against those of younger adults
Findings:
easy tasks = more similar performance between younger and older adults (though, younger adults still have the advantage)
more difficult tasks = much larger difference in performance between younger and older adults
define attention
involves the (1) ability to focus or concentrate on a portion of experience while ignoring other features of that experience, (2) to be able to shift that focus as demanded by the situation, (3) and to be able to coordinate information from multiple sources
What are some types of attentional tasks?
- visual search task
- stroop test
- sustained attention task
define visual search tasks
these tasks require that the observer / participant locate a specific target among a set of distractors
what are the types of visual search tasks?
simple visual search:
- the target differs from the other stimuli by only one feature such as shape, colour, or size
(ex. task may be to respond by pushing a button every time you saw a specific target in front of the screen)
conjunction visual search:
- the target differs from the distractors in more than one way
(ex. may be asked to detect a red ‘X’, while stimuli may be different coloured letters)
what type of processing do visual search tasks rely on?
simple visual search
- parallel processing
–> able to scan the whole image at once, just looking for the one feature that matches that of the target
conjunction visual search
- serial processing (more time-consuming)
–> must scan EACH target to determine whether or not it has all the qualities of the target (typically need to detect 2+ features)
how does age impact the results of visual search tasks?
simple visual search:
older and younger adults perform relatively similar
conjunction visual search:
older and younger adults perform less efficiently ; however, its more difficult (requires more cognition) for older adults
what is the stroop test and what does it test for?
in this test, participants are asked to tell the name of the ink colour in which a word is printed
- tests for inhibitory control
good inhibitory control = quick and accurate performance in the stroop test
define inhibitory control
the process of turning off one response while performing another
what is the sustained attention task?
participants must only respond when they see a particular target appear in a continuous stream of stimuli
how do older adults perform in sustained attention tasks?
older adults tend to have more difficulty with this task because they take longer to shift their focus from trial to trial
what is the ‘over-the-hill’ mentality and how might it relate to aging?
Belief that the more one worries about how they are performing, the less able they are to concentrate on the task
–> those who are worried about the aging of their cognitive abilities are more likely to engage in identity accommodation
what are the theories of attention and aging?
attentional resources theory:
suggests that attention is a process that reflects the allocation of cognitive resources ; people must dedicate a certain proportion of their mental operations to certain objects or tasks
–> claims that older adults have greater difficulty on attentional tasks because they have a decreased availability of attentional resources, leading to longer times to respond
inhibitory deficit hypothesis:
suggests that aging reduces the individual’s ability to inhibit or tune out irrelevant information
–> claims that older adults will perform better when they have fewer distractions
what is the relationship between video game players and attention?
cognitive benefits:
- improved attentional capacity
- more efficient eye movement
- able to scan environments quicker
- better able to focus their attention and ignore distracting stimuli
- able to keep track of multiple targets at once
- ability to process rapidly changing streams of information
what is the relationship between driving and aging?
changes in basic cognitive function may impair older adult’s ability to drive safely
–> ex. loss of eye sight, reaction speed (although years of experience may compensate for these changes)
what is the biopsychosocial view on driving and aging?
bio:
changes in vision and reaction time
psycho:
internal distractions may cause anxiety
social:
distance from work, pleasure, and lack of public transportation services
–> prejudice from younger adults may increase driving anxiety
what is the dataset on motor vehicle fatalities for older adults?
older adults (65+) are more likely to be in motor vehicle accidents due to distractions