Definition of "volitionally"

If, on the other hand, the external impression be also felt, then the mind, according to its psychological laws, connects volitionally with it many other conceptions, the internal impressions of which can produce through the motor nerves such sentient actions as the unfelt external impression could not have developed at all, or, at least, not in combination with the will of the animal.

1851, Johann August Unzer, The Principles of physiology‎, page 201

The people in all of these examples use attention volitionally

1998, Richard B. Ivry, The Two Sides of Perception‎, page 123

Must a person endorse, be satisfied with, or at least fail to feel alienated from what is volitionally necessary and what is inescapable if these are to be included within her self-conception?

2005, John Christman, Autonomy and the Challenges to Liberalism: New Essays‎, page 86