Before a researcher can study the effects of a new drug on cancer patients, she first assigns individuals to the control group and the experimental group. Each study participant has an equal chance of being assigned to either group
This procedure is known as
A) correlation.
B) cross-sectional method.
C) longitudinal method.
D) random assignment.
D) random assignment. Random assignment helps to ensure that, on average, any differences between conditions are due to the independent variable(s), rather than systematic differences between participants.
You might also like to view...
The year is 1900 and you are looking for a job in a psychology laboratory, somewhere in North America. Assuming that each laboratory has an opening, about how many laboratories will you have from which to choose?
a. 1 b. 4 c. 40 d. 400
Which of the following laws was passed in 2008 to protect the genetic privacy of citizens?
A) Americans with Disabilities Act B) Family and Medical Leave Act C) Genetic Information Nondiscrimination Act D) Employment Nondiscrimination Act