a temporary chemical influence which usually produces a brief variation in performance or physical motion in mature animals. For instance, escalated testosterone in male songbirds during the growing season causes escalated violence in terrain protection and an increase in the bird's wooing performance.

ACTIVATIONAL EFFECT: "Activational effects occur in the majority of all women still menstruating- each month, increases and decreases in estrogen and progesterone can be the cause of a vast array of physical, emotional, and cognitive changes."
Cite this page: N., Sam M.S., "ACTIVATIONAL EFFECT," in, April 7, 2013, (accessed October 22, 2021).