To avoid bias and confounds in a controlled experiment, participants should be assigned to either the experimental or control group ____.
a. on the basis of careful thought
b. randomly
c. on the basis of individual tests
d. according to age variables
Question 2
Derrill is worried that variables such as age, gender, personality characteristics, and education level might confound the results of his experiment, which is designed to test the effects of mood on reaction time. Derrill should use ____ assignment to experimental groups to distribute the impact of these ____ variables.
a. random; representative
b. representative; random
c. representative; representative
d. random; random
a) Lunge with your legs open to the table. b) Avoid lunging with your legs close to table.
Avoid hiking your shoulders as you pull back.
How to avoid car insurance claims
A Schematic Representation of the Flawed Predator Experiment
Blood pressure is controlled by the cardiovascular and kidney systems
The Taylor–Woods–Hughes experiment