Joseph conducts an experiment on the effects of color on happiness. He takes the first two rows in his class and places them in one condition, and then he places the back two rows of students in another condition.

What is the problem with this experimental design?

A. There is no independent variable.
B. There is no dependent variable.
C. The experiment does not include random assignment.
D. The experiment does not include deception.

The problem with this experimental design is that the experiment does not include random assignment, which is essential to ensure that participants are equally distributed between the conditions, minimizing the influence of confounding variables.Random assignment helps create initial equivalence among participants, allowing for more accurate conclusions about the effects of the independent variable on the dependent variable.

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