28 Jun A researcher systematically varies people’s stress levels
Question
A researcher systematically varies people’s stress levels to examine the effects of stress on performance. The researcher includes a self-report measure of stress as
a. a manipulation check
b. a control for confounding
c. a measure of the extraneous variable
d. a measure of the independent variable
Holding a variable constant prevents a variable from becoming a confound by
a. ensuring a nonbiased sample.
b. eliminating all sources or error.
c. increasing the differences between the groups.
d. restricting the range of a variable.
For a between-subjects experiment, one of the primary threats to internal validity is
a. practice effects.
b. individual differences among participants that may existbetweentreatment conditions.
c. individual differences among participants that may existwithintreatment conditions.
d. the risk that one treatment condition may influence scores in other treatment conditions.
An effect of counterbalancing order of administration of conditions is to _____.
a. to separate the order effects from the treatment effects
b. to eliminate order effects
c. to subtract out the order effects along with the individual differences
d. to spread the order effects equally across the different treatment conditions
An advantage of the between-subjects design versus the within-subjects design is that between-subjects ____.
a. usually is a more sensitive test (more likely to detect a treatment effect)
b. eliminates potential problems that may be caused by individual differences
c. eliminates the risk of order effects
d. generally requires fewer participants
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