Reaction time is rarely used as a dependent variable in research on attention.
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In a cross-sectional developmental study, age would be the quasi-independent variable.
a. True
b. False
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Any factor that leads to differences between the groups at the start of the study is termed a(n) ____ threat.
a. selection
b. intervention
c. instrumentation
d. regression
Interest in reaction time began with phenomena discovered among eighteenth-century astronomers.
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A repeated-measures analysis of variance is the appropriate statistical analysis for comparing mean differences for a differential design comparing samples representing three populations.
a. True
b. False
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The statistical phenomenon that causes a group's average performance on one measure to appear closer to the mean of that measure at the second measurement is referred to as a(n) ____ threat.
a. history
b. mortality
c. instrumentation
d. regression
Studies that measure RT should also record error rate, because errors tend to be lower when a task is completed quickly.
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The changes that occur as a person ages from child to adult to elderly are called cohort effects.
a. True
b. False
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When a significant number of subjects drop out of a study, there is a(n) ____ threat.
a. history
b. mortality
c. instrumentation
d. regression
In the Donders' B (or choice) reaction task, two stimuli are linked to one response.
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