Final answer:
When the monkey's lever-pressing behavior is reinforced with a banana-flavored treat, the occurrence that would produce the most dopamine activity is when the monkey actually receives the treat after lever-pressing.
Step-by-step explanation:
In this scenario, when the hungry monkey's lever-pressing behavior is reinforced with a banana-flavored treat, the occurrence that would produce the MOST dopamine activity is when the monkey actually receives the banana-flavored treat after lever-pressing.
Dopamine is a neurotransmitter that is associated with feelings of pleasure, motivation, and movement. It is released in response to rewarding stimuli, such as receiving a treat for a specific behavior. The anticipation and actual receipt of the treat would lead to a surge of dopamine activity in the monkey's brain.
For example, when the monkey successfully presses the lever and receives the banana-flavored treat, dopamine neurons in its brain would become active, releasing dopamine and creating a sense of reward and pleasure.