An act is the volitional movement of a person's body. Unconscious or instinctive acts are not considered volitional. You have to think it for it to be an act.

It is the volitional form of the verb "yaru," meaning "to do."

Non-volitional behavior refers to actions or responses that occur involuntarily, without conscious control or intention. These behaviors are often reflexive or instinctual in nature, such as blinking, sweating, or certain emotional reactions.

When Wundt said volitional acts are creative but not free, he meant that individuals have the power to actively shape their experiences and actions, but this creativity is still subject to various internal and external influences such as past experiences, societal norms, and genetic predispositions. In this context, creative refers to the active and intentional nature of volitional acts, while not free means that these actions are not entirely independent of determining factors.

The test that focuses on volitional incapacity is called the "insanity defense" or the "irresistible impulse test." It is used in legal proceedings to determine if a defendant lacked the ability to control their actions due to a mental disorder at the time the crime was committed.