A researcher assigns participants to receive a caffeinated or non-caffeinated beverage. The type of beverage is the subject variable.
Indicate whether the statement is true or false
When a change in the dependent variable could be due to how participants were picked or assigned to groups, __________ is a threat to internal validity.
a. history
b. maturation
c. regression to the mean
d. selection
Which of the following statements regarding a within subjects design is correct?
a. Participants are exposed to only one level of the independent variable.
b. Participants are exposed to all levels of the independent variable.
c. Participants are exposed to a maximum of two levels of the independent variable.
d. None of the above.
Gender is an example of a subject variable.
Indicate whether the statement is true or false
Darley and Batson conducted a study in which the independent variable was the degree to which the participants were instructed to hurry to the other building (high-hurry, intermediate-hurry, low-hurry) and the dependent variable was the amount of
help offered to a victim placed by the researchers between the two buildings. This was a between subjects design. Therefore, how many groups of participants were needed?
a. one group
b. two groups
c. three groups
d. cannot be determined
Quick Reply
