Dr Gavin Is Conducting a 2 × 4 Independent-Groups Factorial

question 53

Multiple Choice

Dr. Gavin is conducting a 2 × 4 independent-groups factorial design. How many independent variables are in his study?

• A)2
• B)4
• C)6
• D)8

---

Definitions:

Density

A physical property representing mass per unit volume.

Serotonin

A neurotransmitter that plays a key role in mood regulation, appetite, sleep, and other physiological processes.

Dopamine

A neurotransmitter in the brain that plays a major role in reward-motivated behavior, movement, and cognitive functions.

Testosterone

The male sex hormone, high levels of which have been linked to aggression and violence in both animals and humans.