Diaz Conducts a Decision-Making Experiment to Determine If People Reason

question 139

Multiple Choice

Diaz conducts a decision-making experiment to determine if people reason more logically when they have more time to decide.All the participants who are under 40 are allowed 15 minutes to reach a decision about a problem; all the participants who are over 40 are allowed 20 minutes to reach a decision about the same problem.What is the problem with this experimental design

• A) The age of the participants is confounded with the independent variable. 
• B) There are two control groups and no experimental group. 
• C) There is no dependent variable in the experiment. 
• D) The time allowed for the decision is confounded with the independent variable.